$($d$)$ Find the effective rate of interest when an interest rate of $5\%$ is applied to the original capital of $10,000$ and compounded monthly.

$($e$)$ What is a zero$-$coupon bond? Give an example.

$2$

$1+1$

$($f$)$ A company has to redeem debentures of $10,00,000$ at the end of $3$ years from now. How much money should the company accumulate every year at $10\%$ interest rate?

$2$