$$ A government bond with a $9-$year duration is worth with a yield to maturity of $8$ pex cent$-$If the yield to maturity falls to $7\mathrm{.}84$ per cent, calculate the new value of the bond.

$[5$ Marks$]$

If Bungwe borrows $K1,250$ from his workmate and next year payable at $K1,600$ back from Bungwe. Calculate the yield to maturity on this loan.

$[5$ Marks$]$

$(6.$ Discuss the nexus between financial sector development and economic growth.

$[8$ Marks$]$