The Pacific halibut fishery has been modeled by the differential equation dy/dt= ky(1 - Y/M) 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 M = 7 times 107 kg, and k = 0.78 per year. If y(0) = 2 times 107 kg, find the biomass a year later. (Round your answer to two decimal places.) times 107 kg How long will it take for the biomass to reach 4 times 107 kg? (Round your answer to two decimal places.) yr