9. (11 points) Suppose that t years from now, one investment will be generating profit at the rate of P(1) - 50++ hundred dollars per year, while a second investment will be generating profit at the rate of P() = 200+5t hundred dollars per year. 1. For how many years does the rate of profitability of the second investment exceed that of the first? W b. Compute the net excess profit for the time period determined in part (a). Include an accurate sketch