$2\mathrm{.}1.$ You are $24$ years old, and an entrepreneur. You wish to provide for your old age. Imagine that

you invest R$36000$ per year at an effective rate of return of $9\%$ per year for the next $40$ years,

with the first deposit beginning one year hence.

Calculate the money you will you have after $40$ years. $\{4\}$

$2\mathrm{.}2.$ Mpho is considering to buy a car for R$140000.$ The bank has quoted him an interest rate of

$12\%$ per annum, compounded monthly. If he wishes to repay the principal amount over $50$

months.

Calculate his monthly instalment.