Please using C++

Write a program to satisfy the following requirements 1. Define 2D array type integer with size 3 x 3 2. Ask the user to enter each elements of 2D array. 3. Write a function to calculate and return square of sum of all major diagonal elements, (element where its row equal to its column as shown in figure 1). Call this function in function main and pass the 2D array. 4. Display all the elements and the square of sum of all major diagonal elements. Figure 1: major diagonal elements Example of the output if the input data 1 234 56789 ali elements are 1 2 3 4 5 6 7 8 9 square of sum of all major diagonal elements is 225