(5 points) Consider the following binary operations. For each operation, determine if the parallel prefix algorithm can be used to compute prefix sums of a sequence of n operands based on the given binary operation. (a) op(a,b) = 2a + b (b) op(a,b) = ab (a + b) (c) op(a,b) = Va2 + 62 (d) opl, b) = a b (x is the vector cross-product in 3D) (Hint: For every , x = 0, and x=0 (5 points) Consider the following binary operations. For each operation, determine if the parallel prefix algorithm can be used to compute prefix sums of a sequence of n operands based on the given binary operation. (a) op(a,b) = 2a + b (b) op(a,b) = ab (a + b) (c) op(a,b) = Va2 + 62 (d) opl, b) = a b (x is the vector cross-product in 3D) (Hint: For every , x = 0, and x=0