I have to write an object-oriented Java program that implements a class gradebook using a two-dimensional array list and use 5 methods.

the first needs to return a two-dimensional array with students names and their grades entered by the user using java.util.Scanner.

the second needs to accept that two-dimensional array as a parameter and return a two-dimensional array that includes the students average.

the third should accept that two-dimensional array as a parameter and return a two-dimensional array that includes class average of each assignment.

the fourth needs to accept that two-dimensional array as a parameter and return a two-dimensional array that includes the students overall letter grade based on the average.

the fifth is the main method and format the output. It also needs to call all the other methods.

I am really stuggling with this so any suggestions or help would be greatly appreciated.