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Which of these would compile and end up creating a Circle called circle? Assume circle has a no-arg and a 1-argument constructor. Check all that would work (don't worry about "better" vs "worse" ways of doing it). Circle circle(); Circle circle = Circle(); Circle circle(5); Circle circle = Circle(5); Variables that are shared by every instances of a class are static variables member variables const variables instance variables Suppose you wish to provide an accessor function for a boolean property finished, what signature of the function should be? bool setFinished() bool getFinished() void setFinished(bool value) void getFinished(bool value) Which of the following statements are true? Encapsulating data fields makes the program shorter. Encapsulating data fields makes the program easy to maintain. Use the private keyword to encapsulate data fields. If you don't use the public keyword, the visibility is private by default. When invoking a function with a reference object parameter, the function ends up with a link back to the original object and can modify it the object is copied, the function ends up with a link to the copied object a copy of the object