O Question 6 Suppose the foo class does not have an overloaded assignment operator (-). What happens when an assignment a=b; is given for two foo objects? The value of a is copied to b The copy constructor if available, is used Compiler error Run-time error Question 7 When should you use a const parameter passed by reference? 1 pts Always 1 pts Whenever the data type might be many bytes, the function changes the parameter within its body, and you DO NOT want these changes to alter the actual argument. Whenever the data type might be many bytes, the function changes the parameter within its body, and you DO want these changes to alter the actual argument. Never, const variables should not be passed by reference