2. (10 points) The quantity, Q mg, of nicotine in the body i minutes after a cigarette is smoked is given by Q = f(t). a. Interpret the statements f (20) = 0.36 and f'(20) = -0.002 in terms of nicotine. What are the units of the numbers 20, 0.36, and -0.002? b. Use the information given in part (a) to estimate (30)