a) How do you declare an object’s reference variable? What does it store?  b) When will a class have a default constructor? How do you create a default constructor in Eclipse?

Help, I making a elevator simulator. I have to use polymorphism and object oriented programming to write this code. Can someone please help me improve this code I have. The remaining code is in the pictures. Any help is appreciated. Thank You! The simulation should have 4 types of Passengers: Standard: This is the most common type of passenger and has a request percentage of 70%. Standard passengers have no special requirements.  VIP: This type of passenger has a request percentage of 10%. VIP passengers are given priority and are more likely to be picked up by express elevators.  Freight: This type of passenger has a request percentage of 15%. Freight passengers have large items that need to be transported and are more likely to be picked up by freight elevators.  Glass: This type of passenger has a request percentage of 5%. Glass passengers have fragile items that need to be transported and are more likely to be picked up by glass elevators.   The simulation should also have 4 types…

What exactly do you mean when you talk about "constructors"? What exactly is the Constructors' main objective?

1) Do you think it is possible to create another constructor with the same set of parameters? For example, adding the following constructor to Volunteer. Place a check (​​✓)​​ beside your answer.Volunteer(): name_("Default"), branch_("CSU Long Beach") { } Yes, because you can overload constructors much like how you overload member functions. No, because the program will not know which constructor to use. No, because the body of the constructor is empty. 2) Much like constructors, member functions can also be overloaded. Write the name of Volunteer's overloaded member function. Take note that member function overloads need to have the same return type. 3) How do you think the compiler knows which member function overload it should call? Place a check (​​✓)​​ beside your answer. It checks the name of the member function that was called. It compares the number of arguments and their data types with the member function's parameters. It always calls the overload with the least number of…