C++ thanks!

1. Write a function that finds the maximum value in an array containing n integers. Compute T(n) for the function. Write a function that finds the largest difference between successive integers in an array containing n integers. Compute T(n) for the function. Write a function that matches an input key in an array of n integers that are sorted in ascending order. Compute T(n) for the function. Write a function that computes the mean value of an array of n integers. Compute T(n) for the 2. 3. function