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Create a class of Circles with attribute radius that defaults to 1. (It must be positive for every circle.) Provide member methods that calculate the...

Create a class of Circles with attribute radius that defaults to 1. (It must be positive for every circle.) Provide member methods that calculate the perimeter and the area of the circle. Also, provide set and get methods for the radius attribute.
(Hint: perimeter = 2*radius*; and area = radius*radius*;  is a constant, can be set to 3.14 here.)

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