4 The equation connects the variables A, x, y, :, P and Q. 2 .+' : 32\" '1) Q P The following changes are made: x and _1' are both increased by 50 % : is decreased by 20 % P is doubled and Q remains the same. What is the resulting percentage change in A? A 10 % decrease B 10 % increase C 2.5 % increase D 2.5 % decrease E 20 % decrease F 20 % increase 20 The longest side of a right angled triangle is 6 + v5 units. One of the shorter sides is 3+2v5 units. What is the length of the third side? A 213 B 70 + 24V5 C 12 D 3- 15 E 14 + 7.515