First, create a project named $"$HW$1"$;

Second, create a module named "Grade" $.$ In this module, you need to define two functions:

$1)$ calc$\_$average: this function receives a list of scores, then calculates the average of scores in this function and return the average.

$2)$ converter : this function receives a score, verifies it is a valid grade $(0$~$100)$ first, and then coverts the score into a letter grade based on the criteria in the following table and returns the letter grade.

P$1-$Grade.jpg

Third, create another module named "Grade$\_$Tester". This module will import the Grade module. Tester will test the functions defined in Grade module. To test the functions, it will ask users dynamically enter $5$ grades and then pass the grades to the Grade.calc$\_$average$(),$ then call Grade. converter$()$ to convert the average grade into a letter grade and display it on screen. When finish one$-$round testing, the Tester allows users to continue to test more grades. Attach your testing runs data to the Tester module and save the data.