The (grades.txt) after exection needs to be single lines. (See attachment)The expected output is also attachedHere is the question:This program will have three functions, the main() create() and retrieve().main() will call create() and then call retrieve()create() will prompt the user to enter any number of course name / grade pairs and write them to a file named grades.txt. Pressing Enter with no input value on the course name will exit the loop, close the file, print "File was created and closed" and return the bool value True to the main()retrieve() will open and read grades.txt. The function then will print the course names and scores as shown below. The average score should be calculated as well as a simple GPA and displayed to two decimal places and then return variable used for the GPA to the main() . See sample run below in which 4 course names were entered, but note that more or fewer courses could have been entered. Below is the transcription of the text from the provided image, formatted for an educational website:---**Expected Output - Grades**The following are the expected outputs for the courses listed:1. **CCP1000** - Expected Grade: 78 2. **MAT1020** - Expected Grade: 99 3. **DUS2100** - Expected Grade: 89---### Explanation of Listed ContentThe information denotes the expected grades for three different courses, identified by their respective course codes. Each course code is followed by the anticipated numeric grade. There are no graphs or diagrams included in the provided image. For each course listed:- **CCP1000** is expected to have a grade of 78.- **MAT1020** is expected to have a grade of 99.- **DUS2100** is expected to have a grade of 89.These grades may reflect student performance metrics or objectives set by the educational institution. **How to Calculate Your GPA**The process of recording and calculating GPA (Grade Point Average) typically involves inputting grades for each course. Here's a step-by-step example of how you might do this. 1. **Enter Course Data** - You start by entering the course name followed by the grade achieved for each course. ``` Enter course name or Enter to quit: COP1000 Enter grade (integer) achieved: 96 ``` - You continue this for each course: ``` Enter course name or Enter to quit: MAT2040 Enter grade (integer) achieved: 77 ``` ``` Enter course name or Enter to quit: PHY2100 Enter grade (integer) achieved: 79 ```2. **Completion of Data Entry** - Once all courses and grades have been entered, the data entry process is concluded. ``` Enter course name or Enter to quit: File was created and closed ```3. **Grade Summary** - After inputting all the necessary data, you can review the grades for each course: ``` Here are your grades: COP1000 score is 96 MAT2040 score is 77 PHY2100 score is 79 ```4. **Average Grade and GPA Calculation** - The average grade among the courses is calculated. - GPA is also provided based on the entered grades. ``` Average grade among your courses is 84.00. Your GPA is 2.67 ```**Explanation**- COP1000: Scored 96- MAT2040: Scored 77- PHY2100: Scored 79To calculate the average grade:- Add all the scores: 96 + 77 + 79 = 252- Divide by the number of courses: 252 / 3 = 84The GPA of 2.67 in this context appears to be calculated from the average grade, though usually, the GPA might also take into account the credit hours and the grading scale. It's important to conform to your institution's specific GPA calculation formulas.This exemplifies a practical scenario of tracking your academic performance and understanding how each grade impacts your overall GPA.

Since, programming language is not mentioned in the question, we will answer this question in Python…

Answered: The (grades.txt) after exection needs…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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The (grades.txt) after exection needs to be single lines. (See attachment)

The expected output is also attached

Here is the question:

This program will have three functions, the main() create() and retrieve().

main() will call create() and then call retrieve()

create() will prompt the user to enter any number of course name / grade pairs and write them to a file named grades.txt. Pressing Enter with no input value on the course name will exit the loop, close the file, print "File was created and closed" and return the bool value True to the main()

retrieve() will open and read grades.txt. The function then will print the course names and scores as shown below. The average score should be calculated as well as a simple GPA and displayed to two decimal places and then return variable used for the GPA to the main() . See sample run below in which 4 course names were entered, but note that more or fewer courses could have been entered.

Below is the transcription of the text from the provided image, formatted for an educational website:

---

**Expected Output - Grades**

The following are the expected outputs for the courses listed:

1. **CCP1000**
- Expected Grade: 78

2. **MAT1020**
- Expected Grade: 99

3. **DUS2100**
- Expected Grade: 89

---

### Explanation of Listed Content

The information denotes the expected grades for three different courses, identified by their respective course codes. Each course code is followed by the anticipated numeric grade. There are no graphs or diagrams included in the provided image. For each course listed:

- **CCP1000** is expected to have a grade of 78.
- **MAT1020** is expected to have a grade of 99.
- **DUS2100** is expected to have a grade of 89.

These grades may reflect student performance metrics or objectives set by the educational institution.

**How to Calculate Your GPA**

The process of recording and calculating GPA (Grade Point Average) typically involves inputting grades for each course. Here's a step-by-step example of how you might do this.

1. **Enter Course Data**

- You start by entering the course name followed by the grade achieved for each course.

```
Enter course name or Enter to quit: COP1000
Enter grade (integer) achieved: 96
```

- You continue this for each course:

```
Enter course name or Enter to quit: MAT2040
Enter grade (integer) achieved: 77
```

```
Enter course name or Enter to quit: PHY2100
Enter grade (integer) achieved: 79
```

2. **Completion of Data Entry**

- Once all courses and grades have been entered, the data entry process is concluded.

```
Enter course name or Enter to quit:
File was created and closed
```

3. **Grade Summary**

- After inputting all the necessary data, you can review the grades for each course:

```
Here are your grades:
COP1000 score is 96
MAT2040 score is 77
PHY2100 score is 79
```

4. **Average Grade and GPA Calculation**

- The average grade among the courses is calculated.
- GPA is also provided based on the entered grades.

```
Average grade among your courses is 84.00. Your GPA is 2.67
```

**Explanation**

- COP1000: Scored 96
- MAT2040: Scored 77
- PHY2100: Scored 79

To calculate the average grade:
- Add all the scores: 96 + 77 + 79 = 252
- Divide by the number of courses: 252 / 3 = 84

The GPA of 2.67 in this context appears to be calculated from the average grade, though usually, the GPA might also take into account the credit hours and the grading scale. It's important to conform to your institution's specific GPA calculation formulas.

This exemplifies a practical scenario of tracking your academic performance and understanding how each grade impacts your overall GPA.

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