Let B = {x,y,z, w}. and C= {1,2,3,4,5). Let g and h be the relations defined below: g= {(x, 1), (y, 2), (2, 5), (w,5)} h = {(1, 2), (2, 1), (3, 5), (4,3)} (a) Is g a function from B to C? Justify your answer for credit. (b) Is h a function from C to C?