A cricket ball of mass 150 g has an initial velocity (3i + 4j)ms-1 and a final velocity v = -(3i + 4j)ms-1 after being hit. The change in momentum (final momentum-initial momentum) is (in kg ms1)
(a) zero
(b) –(0.45i + 0.6j)
(c) –(0.9i + 1.2j)
(d) –5(i + j).