CIS1068
FIVE MINUTE TEST #11 (15 minutes)
04/27/2010

(10)	1. A is an interface, B is an abstract class that implements A,
	   C is a concrete class that extends B. Indicate what statements 
	   are legal:
		A a1 = new A();
		A a2 = new B();
	        A a3 = new C();
		B b1 = a3;
		C c1 = new C();






(15)    2. Write the function public static double maxSum(double[][] a)
	   which computes the sum of the values at each row and
	   returns the largest sum.
	   You can assume that no array is null or empty.


















(15)	3. Write the method public static Fraction avg(Fraction[] a)
	   which returns the average of all the Fractions in a.
	   You can assume that a is not null or empty.