Suppose u and v are functions of x that are differentiable at x = 0 and that d u(0) = - 9, u'(0) = 2, v(0) =6, and v'(0) = 4. Find the values of the following dx (uv) = derivatives at x = 0. d a. dx (uv) b. - dx d C. dx d. (8v - 7u) dx