Kamau, currently aged $45,$ purchases a whole life assurance policy with a sum assured of $10,000$ payable immediately on death. The expenses are: Initial expense of $160$ plus $75\%$ of the annual premium, Renewal expense of $50($incurred throughout life from year $2$ onwards$)$ plus $4\%$ of the annual premium $($incurred at the time of payment of each premium from year $2$ onwards$),$ Claim expenses of $2\mathrm{.}5\%$ of sum assured incurred when the benefit is payable. Mortality follows AM$92$ Ultimate table and interest is $4\%.$ Calculate the net premium that Kamau needs to pay annually in advance for ten years or until his earlier death.

Select one:

$537\mathrm{.}69$

$413\mathrm{.}34$

$561\mathrm{.}48$

$318\mathrm{.}72$

$336\mathrm{.}50$