in C++

Problem 1. Write a recursive function that will compute the sum of the first n integers in an array of at least n integers. Hint: Begin with the nth integer. Problem 2. Given an integer n > 0, write a recursive C++ function that writes the integers 1, 2, Problem 3 of n characters. For example, writeLine(*, 5) produces the line *****. b. Now write a recursive function writeBlock that uses writeLine to write m lines of n a. Write a recursive C+function writeLine that writes a character repeatedly to form a line characters each. For example, writeBlock(*", 5, 3) produces the output **