Write a program that lets the user enter four quarterly sales figures, Java programming help

A company has six divisions, numbered 1-6. Write a program  that lets the user enter
four quarterly sales figures for these six divisions, in the order division 1 
quarter 1, division 1 quarter 2, division 1 quarter 3, division 1 quarter 4, 
division 2 quarter 1, etc. There should be input validation, allowing the user to 
only input positive numbers for sales figures. If a user inputs a negative number,
the program  should ignore it and prompt them again.

The figures should be stored  in a two-dimensional array  of doubles . Once the 
figures are entered, the program  should display the following data for each quarter:

? A list of the sales figures by division
? Each division?s increase  or decrease  from the previous quarter 
(this will not be displayed for the first quarter)
? The total sales for the quarter
? The company?s increase  or decrease  from the previous quarter 
(this will not be displayed for the first quarter)
? The average sales for all divisions that quarter
? The division with the highest sales for that quarter