write a marks calculation in Python

application to ask the user for a list of marks$$ of students which should be entered

using the keyboard.

The numbers should be entered one at a time. You should devise a way for the user

to tell the application that all the numbers have been entered. Hint: use a loop.

The application should tell the user how many numbers they have entered and then

present a menu of choices as follows:

$1.$ Print the mean of the numbers

$2.$ Print the median of the numbers

$3.$ Print the mode of the numbers

$4.$ Go back and enter a NEW set of numbers

$5.$ Exit the application

Part $2$

Add more functionality as follows:

$1.$ Allow only numbers to be added, give an error message to the user prompting

them to enter the value again.

$2.$ Check that at least two numbers have been added before presenting the menu.

$3.$ Find the skewness of the values in the list

Part $3$

Add more functionality as follows:

$1.$ Allow multiple numbers to be added as a string with the numbers separated by

commas $($as well as individually$).$ Hint: you will need to check whether a number entered

contains one or more commas.

$2.$ Add another menu choice to enter more numbers $($to the ones already entered$).$

$3.$ Add the functionality to read the data file from the computer hard$-$drive

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