Q7: Continue with Integer class: a) Copy the previous program to a new file. b) Overload the postfix operators, so return a Word object with remove last character of value c) Overload the pretfix operators, so return a Word object with remove first character of value. d) Overload the subscript operator, terminate program if index is bigger or equal than size. Return i-th character based on the given index. Class template (complete following function): class Wordt ***** friend Word operator-//postix friend Word operator-i/preffix char& operator } Use following main() to test your class. int main Word a("abc"),b; cout