In this lab, you write a while loop that uses a sentinel value to control a loop in a python program. you also write the statements that make up the body of the loop. the source code file already contains the necessary assignment and output statements. each theater patron enters a value from 0 to 4 indicating the number of stars that the patron awards to the guide’s featured movie of the week. the program executes continuously until the theater manager enters a negative number to quit. at the end of the program, you should display the average star rating for the movie.