What are the two things that you need to overload an operator for a class? (1, 2) Which of the following operator cannot be overloaded. (2) a. +                         b. ::                        c....

What are the two things that you need to overload an operator for a class? (1, 2)

Which of the following operator cannot be overloaded. (2)

a. +                         b. ::                        c. []                        d. =                        e.

a.  Within the definition of an operator function, how do you refer to the object as a whole? (3)

b. What is the difference between the two statements return this; and return *this;? (3)