PLEASE ANSWER ALL PARTS! Questions in Swift

A base class is a class that a. inherits from another class b. has multiple instances c. is at the root of its class hierarchy d. has at least one superclass a. Unlike a struct, a class never automatically provides memberwise initializers for you b. allows inheritance c. is stored in a reference variable which contains a memory location d. all of the above A subclass is a. a child of another class b. a class from which other classes inherit properties and methods c. the same thing as a base class d. all of the above Inheritance is useful because a. the programmer does not have to duplicate the work that was already done somewhere else b. it helps porgrammers organize data into categories and subsets C. it makes it easier to manage objects that are related to each other in some way d. all of the above The override keyword is used with a. code that ignores something that is inherited b. code that redefines or customizes something that is inherited C. code that implements something that is missing from a parent class d. code that prevents customization of something that is inherited