Define stubs for the functions called by the below main(). Each stub should print "FIXME: Finish FunctionName()" follwed by a newline, and should return -1. Example output: FIXME: Finish GetUserNum() FIXME: Finish GetUserNum() FIXME: Finish ComputeAvg() Avg: -1 Sample program: #include <iostream> using namespace std; <STUDENT CODE> int main() { int num1 = 0; int num2 = 0; intavg = 0; num1 = GetUserNum(); num2 = GetUserNum(); avg = ComputeAvg(num1, num2); cout<< "Avg: " <<avg<<endl; return 0; }