The pacific halibut fishery has been modeled by the differential equation dy dt = ky 1 − y k where y(t) is the biomass (the total mass of the members of the population) in kilograms at time t (measured in years), the carrying capacity is estimated to be k = 9×107 kg, and k = 0.75 per year. (a) if y(0) = 2×107 kg, find the biomass a year later. (round your answer to two decimal places.) 1 incorrect: your answer is incorrect. ×107 kg (b) how long will it take for the biomass to reach 4×107? (round your answer to two decimal places.) years