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.

example:

Average Letter Grade Grade 2 Grade 3 Grade 4 Grade 1 100 Nane Beta Ganna Theta 65.75 95.00 89.90 180 Zeta Siena Lanbda 93.75 66.25 180 75 Khai Average 10 69.30 46.25 79.05 88.50 71.50 Average Letter Grade Grade 2 Grade 3 Grade 4 Grade 1 100 Nane Beta Ganna Theta 65.75 95.00 89.90 180 Zeta Siena Lanbda 93.75 66.25 180 75 Khai Average 10 69.30 46.25 79.05 88.50 71.50