2.Write a C++ program that will load a 2-dimensional array A (4x4 matrix) with random numbers(range: 1-20). The program will display the original matrix A in tabular form and the transpose of matrix A. Store the transpose of A in array B. Transpose of a matrix A is obtained by interchanging all the elements of rows and columns of original matrix.

Use C++

Create a function append(v, a, n) that adds to the end of vector v a copy of all the elements of array a. For example, if v contains 1,2, 3, and a contains 4, 5, 6, then v will end up containing 1, 2, 3, 4, 5,6. The argument n is the size of the array. The argument v is a vector ofintegers and a is an array of integers. Write a test driver.

Utilizing c++, write a code to implement the following:Firstly, create(populate) an array (one with unknown size) and determine its(array's) size. Furthermore, the array should then be sorted and its output(prints out) should print each element in the array in order from the last to the 1st index.