Provide a clear trace of the following recursive functions. Use a separate piece of paper please.

#include

using namespace std;

int sumUpTo(int);

int main() { cout << sumUpTo(8) << endl; return 0; }

int sumUpTo(int n) { int sum = 0; if (n == 1) sum = 1; else sum = n + sumUpTo(n - 1); return sum; }