For time t 2 0, the function C = ate with positive constants a and b gives the concentration, C, of a drug in the body. The figure below shows the maximum concentration reached (in nanograms per milliliter, ng/ml) after a 10 mg dose of the cough medicine hydrocodone bitartrate. Find the values of a and b. C (ng/ml) 22.9 1.6 t (hours) Round your answer for a to two decimal places, and your answer for b to three decimal places. a b =