Q$3.(30$ marks$)$ Write a C$++$ program to do operation for $2$D array. $2\mathrm{.}1-(10)$ The program prompts the user to enter a two$-$dimensional array $(4$x$4)$ of int numbers. $2\mathrm{.}2-(10)$ The program prints that array and calls isIdentity$()$ function to check whether the entered matrix is an identity array or not. Identity array: in which all the elements on the main diagonal are equal to $1$ and all other elements are equal to $0.2\mathrm{.}3-(10)$ The program then calls spiralOrder$()$ function to traverse the matrix in a clockwise spiral pattern and outputs the elements in the order they are visited. Print out those elements in main function