Write a program in C++ to read array 2D with size 3x4 and perform the following: 1- Replace each element in the first row by the constant 2. 2- Find the sum of secondary diameter elements. Write a...

Write a program in C++ to read array 2D with size 3x4 and perform the following: 1- Replace each element in the first row by the constant 2. 2- Find the sum of secondary diameter elements.


Extracted text: Write a program in C++ to read array 2D with size 3x4 and perform the following: 1- Replace each element in the first row by the constant 2. 2- Find the sum of secondary diameter elements.