1a) Write a PYTHON program that asks a user to enter their marks. When the

user is done entering marks, they will enter -1.

Output the average of their marks.

1b) Write a PYTHON program that calculates the average temperature.

Example Input:

Enter the temperature: -14.3

Enter the temperature: 34

Enter the temperature: -6

Enter the temperature: Done

Output:

The average temperature is 4.6 degrees Celsius.