Hello, this is for my intro to programming with C course and we submit our work through in mimir. It would be really helpful if you define variables when writing the code and have the code easily laid out with an explanation on the bottom. Thank you for your time!

Problem: Grading Function #Write a function called getScore() that does not take any parameter. Inside the function, it asks the user to input scores for 3 exams (Each of the exams is out of 100). The final score is calculated by 20% of examl + 30% of exam2 + 50% of exam 3. After calculating the final score, the function returns it to the caller. The scores are floating-point numbers. #Write another function called getLetterGradel) that takes a float parameter and returns the letter grade based on the number passed to it as an actual parameter. #Write the main function to test your program. Call the getScore[] function from the main function and after getting the final score from the getScore function, you should call the getLetterGrade() function to get the Grade for that score. Then print the letter grade returned by the getLetterGrade[] function (So, you are printing the letter grade from the main function based on the grade returned by the getLetterGrade() function]. Here is the scale of the letter grade: A >=90] B [80 - 90) C[70-80) D[ 60 - 70) F(