The population, in millions, of arctic flounder in the Atlantic Ocean is modeled by the function P(t), where t is measured in years. 8t + 7 P(t) = 0.4t2 + 1 (a) Determine the initial flounder population (in millions). million flounder (b) Determine P'(10) (in millions of flounder per year). (Round your answer to four decimal places.) P'(10) = million flounder/yr Interpret P'(10). O P'(10) is the population, in millions, of flounder at year 10. O P'(10) is the average rate of change, in millions of flounder per year, of the population of flounder over 10 years. O P'(10) is the difference in population, in millions, of flounder after 10 years. O P'(10) is the rate, in millions of flounder per year, at which the flounder population is changing at year 10. O P'(10) is the average population, in millions, of flounder over 10 years