A.Write a looping structure (using java- 100X100 array) to process the elements on the main diagonal of a (i.e. only the elements on the diagonal starting from the top left and proceeding to thebottom right). B.Write a looping structureusing( java- 100X100 array) to process the elements on the back diagonal of a (i.e. from top right to bottom left). C.Write a looping structureusing( java- 100X100 array) to process the elements in the lower triangular portion of a (i.e. the first element in the first row, the first two elements in the second row,etc.) D.Write a looping structure(using java- 100X100 array) to process the nine elements centered on (x,y) (i.e. (x,y) and the eight neighboring cells one row and/or column away from (x,y)).