An initial population of 280 fish is introduced into a lake. This fish population grows according to a continuous exponential growth model. There are 588 fish in the lake after 6 years. (a) Let z be the time (in years) since the initial population is introduced, OInO and let y be the number of fish at time . Write a formula relating y to t. X 5 Use exact expressions to fill in the missing parts of the formula. Do not use approximations. (b) How many fish are there 7 years after the initial population is introduced? Do not round any intermediate computations, and round your answer to the nearest whole number. fish