Question $2(12$ points$)$ Salmon farm

A fish farmer has $20,000$ salmon $in$ her farm. The number $of$ salmon increases

$by5\%$ every month, and the farmer harvests $2000$ salmon each month.

$a{P}_n$ for the salmon population after $n$

months. Explain the meaning $of$ each $of$ the terms $of$ the equations for $P_n$

and $P_{0}in$ words.

$b$