(2) Build the following program in your IDE and compile and run it. Input data that is valid as well as invalid // This program demonstrates the swapvars function template. #include using namespace std; template void swapvars (T &var1, T &var2) T temp tempvarl; vari - var2; var2-temp int mainO char firstchar, secondchar; int firstInt, secondInt; double firstDouble, secondDouble; I/ Two doubles // Two chars //Two ints // Get and swapvars two chars cout secondchar; swapvars(firstChar, secondchar); cout >firstInt >secondint swapvars (firstInt, secondInt) cout firstDouble >> secondbouble SwapwarsffisSDOUDsecondoosecendpouble ss endl return 0; Answer the following questions in the yellow box. What happens if you pass var1 and var2 by value instead of by reference