Question $3$

Your Uncle has invested in a BES $($Bireysel Emeklilik Sigortas$-$ Individual Retirement Plan$).$ He has been paying $10,000$ TL per year for the last $25$ years.

a$)$ He tells you that the rate of return on his investment on the retirement plan was $15\%.$ How much money does he have in his account?

b$)$ Tempted by this rate of investment you decide to start investing in BES. Your aim is to have $3,000,000TL$ in $20$ years. How much should you invest each year?