I need help coding these functions in C programming

1. Write a C function to find the maximum and minimum elements in a given array Write a C function to print all the elements in a given array using a recursive approach Write a C function that takes 2D array and convert the rows to columns and the columns to row. Write a C function to shift the elements of an array to the left or the right n positions Write a C function calculates the number of digits in any given integer number, e.g if the input is 2317 the out put is 4 if the input is 5 the output is 1, and if the input is 73 the output is 2