Analyzable Interface
Modify the CourseGrades class you created in
public interface Analyzable
{
double getAverage();
GradedActivity getHighest();
GradedActivity getLowestf();
}
The getAverage method should return the average of the numeric scores stored in the grades array. The getHighest method should return a reference to the element of the grades array that has the highest numeric score. The getLowest method should return a reference to the element of the grades array that has the lowest numeric score. Demonstrate the new methods in a complete program.
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