Polly's Youtube channel is making $$100$ per year. It is expected that the revenue

is going to be the same for the next $5$ years then it will increase to $$120$ per year $($from year $6$

to$10)$ and then it will increase to $$150$ for the remaining years. How much will she have in her

bank account, $15$ years from now, if her mom does not spend his money and if the rate or return is

$2\mathrm{.}5$ percent?