The amount (in grams) of a sample of a particular mineral present after t years is given by A(t) = 5052 433'. Answer the following questions. Round your answers to two decimal places as needed. [a] Find the rate of change of the amount present after 2 years: U grams per year (to) Find the rate of change of the amount present after 5 years: grams per year U (c) Find the rate of change of the amount present after 9 years: grams per year H (d) What is happening to the rate of change of the amount present as the number of years increases? 0 It is decreasing without bound 0 It is decreasing and approaching 0 Q It is increasing without bound 0 It is increasing and approaching 0 (e) Will the amount of mineral ever be completely gone