a Python program that prompts the user to enter grades to a list, alist (which is initially

empty), and calculate the sum and average of the entered grades. The user will continue

entering grades until he/she enters the sentinel value -1.

Notes:

- Grades are in the range from 0 to 20.

- the program should use the while loop to input the grades

- theprogram should print the final list, the sum, and the average (rounded to two figures).

- One of the grades should be the last digit of your ID +10. For example, if your ID

number is 020787521426, then one of the entered grades should be 16 (6+10)

the output :

In case no grades have been entered, the output should be: Enter grades to calculate their average, 1 to stop entry: 1 No grades have been entered! In case of entering some grades, the output should be: Enter grades to calculate their average, 1 to stop entry: 13 Enter another grade, 1 to finish: 12 Enter another grade, 1 to finish: 18 Enter another grade, 1 to finish: 1 [13, 12, 18] The Sum of the entered grades is: 43 The Average of the entered grades is: 14.33 'u-Vnoows bard\