Question 1 Solution

1A)
The array diagram shows 3 rows and 7 columns.
So the following statement will create the array:

int[][] arr = new int[3][7];

1B)
The array diagram shows 4 rows, followed by 3 columns, followed by 5 depth elements.

int[][][] arr = new int[4][3][5];

1C)
i)No error.
ii) No error.
iii) Error.  The first index number is 4 when the allowed index range is 0 to 3.
iv) Error. The second index number should be 0 or 1 only.
v) Error.  No index can ever be negative.

1D)
Here is the code I used to test my solutions:

int[][] a = {{0,1,2,3}, {4,5,6,7}, {8,9,0,1}, {2,3,4,5}};
System.out.println(a[0][0]);  				    //top left element
System.out.println(a[0][a[0].length-1]);		    //top right element
System.out.println(a[a.length-1][0]);			    //bottom left element
System.out.println(a[a.length-1][a[a.length-1].length-1]);  //bottom right element

Note that that bottom right element is pretty messy!