A user-friendly program should print an introduction that tells the user what the program does. Modify the convert.py program (Section 2.2) to print an introduction. Modify the avg2.py program (Section 2.5.3) to find the average of three exam scores. Modify the convert.py program (Section 2.2) with a loop so that it executes 5 times before quitting (i.e., it converts 5 temperatures in a row). A user-friendly program should print an introduction that tells the user what the program does. Modify the convert.py program (Section 2.2) to print an introduction. Modify the avg2.py program (Section 2.5.3) to find the average of three exam scores. Modify the convert.py program (Section 2.2) with a loop so that it executes 5 times before quitting (i.e., it converts 5 temperatures in a row)