Suppose a company has a revenue stream that can be modeled by R(t) = - 0.045t + 0.72t + 0.142 in millions of dollars, further suppose that costs and expenses can be modeled by C(t) = - 0.013t2 + 0.182t + 0.084, where t is the number of years past 1990. Profit = Revenue - Costs The profit function P(t) = The year in which the maximum profit occurs is (If needed, round to the nearest tenth of a year. ) The maximum profit is million dollars (If needed, round to three decimal places.)