MATLAB problem, please show code and comments explaining. Thank you.

[3] Write a program that computes the day of the week (Monday, Tuesday, etc...) for any given date. The formula you can find for yourself. The only requirement is the date you start with is a character array in the form DD/MM/CCYY (day, month, century (18, 19, 20 etc) and year). Do whatever you need to it but employ some checking to ensure the correct date is entered. Create a MatLab-GUI based on problem #3 or any other function you might want to create for yourself. [3] Write a program that computes the day of the week (Monday, Tuesday, etc...) for any given date. The formula you can find for yourself. The only requirement is the date you start with is a character array in the form DD/MM/CCYY (day, month, century (18, 19, 20 etc) and year). Do whatever you need to it but employ some checking to ensure the correct date is entered. Create a MatLab-GUI based on problem #3 or any other function you might want to create for yourself