Compute the derivative of the given function in two different ways. 9(I) = 21'(915) a) Use the Product Rule, [f(x)9(x)]' = f(x) . g(x) + f'(x) . g(x). (Fill in each blank, then simplify.) ! ( z ) = 0)(0)+0).0) b) Use algebra first to simplify 9, then differentiate without the Product Rule. g(z) =