you will develop a basic calculator using functions. Create four functions: add(), sub(), prod() and div() each of which take two parameters of float type and return a float value. Your c++ program should display a menu listing possible choices and depending on the user's choice from the menu, your c++ program should call the appropriate function and display the result.

program - python Write a program that asks the user to enter four test scores. The program should display a letter grade for each score and the average test score. Write the following functions in the program: calc_average—This function should accept five test scores as arguments and return the average of the scores. determine_grade—This function should accept a test score as an argument and display the letter grade for the score within the function, based on the following grading scale:   Score                   Letter Grade 90–100                        A 80–89                          B 70–7 9                         C 60–69                          D Below 60                     F

In C++ Language  Write a function named kinetic that computes the kinetic energy for an object using the following formula:           E = 12mv2E = 12mv2        where: m is the mass of the object                 v is the velocity of the object                 E is the kinetic energy. The mass, m, and the velocity, v, are passed to the function as parameters.  The value of energy, E, is computed and returned.