A company's total cost, in millions of dollars, is given by C(t) = 100- 60e" where t is the time in years since the start-up date. The graph of C(t) is shown to the right. Find each of the following. a) The marginal cost, C'(t) b) C'(0) c) C'(4) d) Find lim C(t) and lim C'(t). 1-00 100 t 15 30