29. The population of a certain species is defined by the following function P(t) 1,000 1 + 9e-t’ where t is measured in years. (a) Find all horizontal asymptotes. (b) Estimate how long it takes for the population to reach 900. (c) Find the inverse of this function and explain its meaning. (d) Use the inverse function to find the time required for the population to reach 900. Compare with the result of part (b).