Find. 2 1 a) + 3 4 2 4 1 3 = + = + = 3 4 4 3 12 b) 5 + 1 8 4 5 = + = + = 8 c) 1 + 1 7 2 = + = + = 1 2 d) + 8 6 = + = + = 24 29