True or False:

1. Operator overloading is an example of polymorphism.

2. The compiler uses the function signature to determine which function to call.

3. A default value for a parameter will be assigned if its value is specified in the function call.

4. The + operator is overloaded since it is used to add integers, floats, and doubles.

5. A friend function does not have access to the private and protected members of a class.