Find functions f and g so that f g = H(x) = (5 - 2x³)².

a. f(x) = 5 - 2x³ ; g(x) = x²

b. f(x) = (5 - 2x)³ ; g(x) = x²

c. f(x) = x² ; g(x) = 5 - 2x³

d. f(x) = x³ ; g(x) = (5 - 2x)²