1. Write a program that reads a file containing a list of numbers, and displays the sum.

2. On July 16, 1969, the Apollo 11 spacecraft launched from Earth. Write a function named countdown() that can simulate a launch countdown, starting from 10 and counting down to 1, followed by the word LIFTOFF !! Heres what the output should look like when you call the function:

10 9 8 7 6 5 4 3 2 1 LIFTOFF !!

(Advanced): Import the time module to use the sleep function to make the countdown more realistic: import time # This will make the computer wait for 1 second time.sleep(1)

In Python.