APEX - Salesforce Write an Apex Class to Multiply two numbes and show in the Console and please add proper comments and output

Exercise 5 - Number to Word Make a new class in the Lab2 project called Num2wordthat prompts the user enter a number between 0 and 9 and then displays the corresponding word (i.e. "zero"for 0, "one"for 1, etc.). Use a switchstatement to do this. Include a default case that lets the user know they entered a wrong number. The switch statement has the following syntax: switch (variable) { case value1: // Code that should execute when variable==value1 break; // this prevents it from automatically going to the next case case value2: // Code that should execute when variable==value2 break; // this prevents it from automatically going to the next case default: // Code that should execute when variable has a value that didn't match the above }

we are going to create a new subclass of the SimpleGeometricObject class, namedTriangle.   Create a Triangle class that extends the SimpleGeometricObject class in Eclipse, followingthe below UML diagram. (seperate code)    Use the following formula to calculate the area of a triangle:A = 1/2 × base × height   the SimpleGeometricObject code is below in link and picture    https://liveexample.pearsoncmg.com/html/SimpleGeometricObject.html   the ending part of the code that didnt appear in the picture    } /** Return a string representation of this object */ public String toString() { return "created on " + dateCreated + "\ncolor: " + color + " and filled: " + filled; } }

Following are descriptions of the MonthCalendar and DateTimerPicker classes.

Would you mind help me write racer class, sensor class, and timestamp class? (Note: The sensor class can have functions to determine if two sensors are adjacent and calculate the speed between them, while the time stamp class can have functions to calculate the time elapsed between two time stamps.) The class of racer should include : 1. Private data: racer number (int), an unknown number of sensor data. Sensor data includes sensor number (int that starts at 0 for start time; the last sensor is finish line), mile marker for the sensor double) and time stamp for each sensor (when racer passes the sensor) with hour, minute, second and millisecond. (You may want instance variables that holds racer's total race time, total race distance, total race speed.) 2. Default constructor 3. Copy constructor: make sure the code copies any vectors contained in the class 4. Set and get functions for private dat. 5. "get" function that computes and returns the racer's total time to complete…