code be written in C++, as a beginner level

Thank you, also plz provide comments to understand the code. thanks

Please do not provide an answer which is already on chegg.

Problem 1 (50 Marks) Write a C++ program that ask a user to input values for an NxM dimension matrix. Such a matrix should have Nx M values. Your program asks a user to first input the size of N and M, and then ask the user to input the values , for example, Please enter the value of entry [0,0]: Please enter the value of entry [0,1]: Each time the user enters a value, output the maximum, minimum, sum, average of the values entered so far