A single dimensional array has 50 elements, which of the following is the correct statement to initialize the last element to 100.

1. x[51]=100
2. x[48]=100
3. x[49]=100
4. x[50]=100

Define a class to accept values into an integer array of order 4 x 4 and check whether it is a DIAGONAL array or not. An array is DIAGONAL if the sum of the left diagonal elements equals the sum of the right diagonal elements. Print the appropriate message.

Example:

3 4 2 5
2 5 2 3
5 3 2 7
1 3 7 1

Sum of the left diagonal element = 3 + 5 + 2 + 1 = 11

Sum of the right diagonal element = 5 + 2 + 3 + 1 = 11

Define a class pin code and store the given pin codes in a single dimensional array. Sort these pin codes in ascending order using the Selection Sort technique only. Display the sorted array.

110061, 110001, 110029, 110023, 110055, 110006, 110019, 110033

Consider the following two-dimensional array and answer the questions given below:

int x[ ][ ] = {{4,3,2}, {7,8,2}, {8, 3,10}, {1, 2, 9}};

(a) What is the order of the array?

(b) What is the value of x[0][0]+x[2][2]?