Task $1$: Write the sum.py program that accepts numerical user input and prints the sum of the numbers and their average.

An example of the program is shown below:

Enter a number or press Enter to quit: $1$

Enter a number or press Enter to quit: $2$

Enter a number or press Enter to quit: $3$

Enter a number or press Enter to quit:

The sum is $6\mathrm{.}0$

The average is $2\mathrm{.}0$