Given the discussion on composite objects from this chapter and the following interface section: @interface Square: NSObject { Rectangle *rect; } -(Square *) initWithSide: (int) s; -(void) setSide:...

Given the discussion on composite objects from this chapter and the following interface section: @interface Square: NSObject { Rectangle *rect; } -(Square *) initWithSide: (int) s; -(void) setSide: (int) s; -(int) side; -(int) area; -(int) perimeter; @end write the implementation section for a Square and a test program to check its methods. Note: make sure you remember to override init as well, because initWithSide: will be your designated initializer.