The population P of a city grows exponentially according to the function P(t) = 6500(1.3), Ostse < < 8 where t is measured in years. (a) Find the population at time t= 0 and at time t = 4. (Round your answers to the nearest wh P(O) = P(4) = (b) When, to the nearest year, will the population reach 13,000?