Can someone please help me with this?

[it] points} Consider a population composed of two age groups, young people and adults. The total population at time t is P\") = Y(t) + AH}, in which PH] is the overall population at t, t) is the number of young people, and A] is the number of adults. The initial {time t = {l} number of young people is 1'01] and the initial number of adults is Aitl). The rate of growth of the young population is try and the rate of growth of the adult population is r ,1. {a} At time t = 15, what is the share of young people in the total population? That is, what is Y{t]fP{t) when t = 15? Please give a solution in symbols, and take care to explain your work. {b} At time t = 15, what is the rate of growth of the total population? Give your solution in symbols and please explain the steps of your work. {e} Assume that Hill) = 40 and AW} = t}. Also, the growth rates are 2 percent for Ty and 1.5 percent for r ,1. Find a numerical solution for the rate of growth of the total population at time t = 15. Please explain. {d} At t = It}, the growth rate of the young age group abruptly falls from Ty to r?\" The growth rate of adults, however, stays at 13.1 as it was before. Please nd the share of the young in the population at time t = 25, that is, nd 1125) f 125). Give your solution in symbols, and take extra care to explain the steps of your work