Betty bought a $9\%$ four$-$year bond with a par value of $$100.$ The bond pays the coupon payments semi$-$annual. The current

discount rate is $10\%.$ Please calculate the PV $($present value$)$ of the $1^{st}$ coupon.

$$3\mathrm{.}89$

$$4\mathrm{.}29$

$$4\mathrm{.}50$

$$3\mathrm{.}70$