Suppose the implementor of the Time class of Exercise •• R3.6 changes from one imple mentation strategy to another, keeping the public interface unchanged. What do the programmers who use the Time class need to do?

Data from Exercise R3.6

Consider a class Time that represents a point in time, such as 9 a.m. or 3:30 p.m.
Give two different sets of instance variables that can be used for implementing the
Time class.