C++

Write a function that sums up the last 5 elements of an array using the pointer notation and pointer incrementing. The program should work efficiently for very large array sizes. Test the function by calling it from the main program. Set the array size to be greater than 5. You may initialize the array as follows: int arrN[10] = {56, 375, 4, 0, 453, 1029, 44, 67, 24, 111};