Suppose that a change in biomass B(t} at timet during :18 n: the interval [0.6] follows the equation E0) = 2 cos [E ] for 0 5 t 5 6. and that B(0)=BD. Use this information to answer parts a through d below. (:3 dB (a) Use the graphing tool to graph the function a as a function of t. Click to enlarge \\ graph I (For any answer boxes shown with the grapher, type an exact answer. Type the word pi to insert the symbol 1! as needed.) dBi'dt Let g(t) = 2 cos (xt). Compute the average value of g(t) over the interval The average value is (Type an exact answer, using x as needed.)