Computer aplication for chemical engineers

Many fields of engineering require accurate population estimates. For example, transportation engineers might find it necessary to determine separately the population growth trends of a city and adjacent suburb. The population of the urban area is declining with time according to: P_u(t) = P_u.max e^-k_ut + P_u.min while the suburban population is growing, as in P_s (t) = P_s.max/1 + (P_s.max/P_0 - 1) e^-k_s t where t is in years. Write a MATLAB script to determine the time (in months) and corresponding values of P_u and P_s when the suburbs are 20% larger than the city. The parameter values are as follows: P_u.max = 75,000 people k_u = 0.045/yr P_u.min = 100,000 people P_s.max = 300,000 people P_0 = 10,000 people k_s = 0.08/yr