In a new CPP file called task_2.cpp", write 1. A function int s_ver_2(int n) that implements an O(n) algorithm to calculate S(n). Example S(7) is computer as follows: 1 (hase case) (base case) + 13 21 2. A main function that tests s_ver_2 by printing the first 15 terms of S(n) like so 55 89 13 233 377