For each of the following programs, start your code with three comment lines explaining your program does, your name as the author, and today's date. 1. Define and call a void function displayMark The function has three parameters: a name, a mark and a letter grade. The function will print a sentence similar to the one in the example below. The CSCI 120 final mark for Rita is 81.0% (A-) Call the function with your name, your current mark and your current letter grade as arguments. (n) define the function - make it! dos in head and body of the function i) call the function by name use 1t1 Save your program as: DisplayMark.py and submit. 2. Define and call a void function splitBill The function has three parameters: the amount of a restaurant bill, a tip amount and the number of persons who split the bill. The function will print out the total amount (bill + tip) and the amount that each person has to pay. Call the function with any three numbers of your choice. Save your program as: SplitBill.py and submit