Help me with my python!!! :)

6) Enter and execute the following code in a file named WhileLabEx6.py. def main(): doAgain = "y" while do Again == "y": word = input("Enter a word:") print("First letter of " + word + is " + word[0]) doAgain = input ("Type 'y' to enter another word and anything else to quit.") print("Done!") main() a. What does the program do? b. What is the name of the variable used to store the user's input? c. In the print statement, what does word [O] represent? d. If you cha 0 to 1 in word[O] in the print statement above, what is printed? e. When does the program end? FYI: A sentinel-controlled while loop is a loop that repeats the loop body until the user enters a pre- specified value. f. Why is the loop in this program is an example of a sentinel control loop? g. Examine the print statement in this program: print("First letter of " + word + " is " + word[0]) What is the purpose of the as part of the argument in the print statement? What happens if you replace the +. with a