Consider the definition of the Measurable interface and the code snippet defining the class:The compiler complains that the $$ method has a weaker access level than the$$ interface. Why?All of the methods in a class have a default access level of package access, while the methods of an interface have a default access level of public.The variable $$ was not declared with public access.All of the methods in a class have a default access level of package access, while the methods of an interface have a default access level of private.The $$ method was declared as private in the $$ interface.