year. In 1990, Alphaville had a population of 6000, and Betaburgh had a population of 3500 . Answer parts a) through c). a) Determine the population models for both cities. The population model for Alphaville is $P(t)=$

Step 1 ：The problem states that in 1990, Alphaville had a population of 6000, and Betaburgh had a population of 3500.

Step 2 ：The problem asks to determine the population models for both cities.

Step 3 ：However, the problem does not provide enough information to determine the population models for both cities.

Step 4 ：We need more information such as the rate of growth or decline of the population in each city.

Step 5 ：Without this information, we cannot proceed to generate a solution.

Step 6 ：If we assume a constant rate of growth, we could use the formula for exponential growth to model the population.

Step 7 ：The formula is \(P(t) = P0 * e^(rt)\), where \(P0\) is the initial population, \(r\) is the rate of growth, \(t\) is time, and \(e\) is the base of natural logarithms.

Step 8 ：But again, without the rate of growth, we cannot proceed.

Step 9 ：\(\boxed{\text{The question does not provide enough information to determine the population models for both cities.}}\)