II. Solve the following problems. 1. A diver jumps off a springboard 10 m above water with an initial upward velocity of 12 m/sec. (Hint: a(t) = -9.8 m/sec?) a. What will be her maximum height? b. When will she hit the water? c. What is the velocity when she hits the water? 2. The marginal cost of printing a poster when x posters have been printed is given by C'(x ) = = x3 -10x+5, where C(x) dollars is the total cost of printing x 4 posters. If the overhead cost is $100, find (a) the total cost function and (b) the cost of printing 30 posters