Q6: Continue with Word class: a) Copy the previous program to a new file. b) Overload the postfix ++ operators, so return a Word object with duplicating last character of value. c) Overload the prefix ++ operators, so return a Word object with duplicating first character of value. Class template (complete following function): class Word{ friend Word operator++ //prefix friend Word operator++ //postfix } Use following main() to test your class. int main(){ Word a("abc"),b; cout