I. SOLVING: Find the following derivatives. (6 items x 5 points) 1. (x3-8 dx x3 +8 2. ~ x2 sin (2x) 3. tan2 x dx cos '(1 - x) . A log 10 (2x - 3) 6 2 da2 35x II. PROVING: Perform what is being asked. (1 item x 10 points) 1. Prove whether the function h(x) is differentiable at x] = 1. h(x ) = (x+2 ifxs1 15 - 2x if x> 1 (Hint: test the one-sided derivatives at x1 = 1.)