A company's total cost, in millions of dollars, is given by C(t) = 70 -50e " where t is the time in years since the start-up date. The AY 150- 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) 75- d) Find lim C(t) and lim C'(t). 1-+ 00 15 30 a) C' (t) = (Do not include the $ symbol in your answer.) b) C'(0) = $ million per year (Simplify your answer. Do not include the $ symbol in your answer.) c) C' (4) = $ per year (Simplify your answer. Round to the nearest thousand as needed. Do not include the $ symbol in your answer.) d) lim C(t) = $ million 1 + 00 (Simplify your answer. Do not include the $ symbol in your answer.) lim C' (t) = $ per year