Default arguments allow you to call a single function using different numbers of arguments. Write a function product that takes up to five double arguments. You can call the function with two, three, four, or five arguments. Examine the tester program to see how the functions are used. Complete the following files: defargs.cpp #include "defargs.h" 1 2 3 4 5 // Write your functions here 6 defargs.h #ifndef DEFARGS_H #define DEFARGSH 1 2 3 4 #endif Submit Use the following file: Tester.cpp #include #include using namespace std; #include "defargs.h" int main() { cout