$1.$ Suppose the Yield to maturity for ACI bond is $12\%.$ What is the value of the bond today if the annual coupon rate is $8\mathrm{.}5\%,$ maturity is $7$ years and principal is $1,000$ taka?

$2.$ What would be the value of the bond if the $8\mathrm{.}5\%$ coupon is paid semi$-$ annually?

$3.$ What is the YTM of the bond if bond value is $1800$ taka other things remaining the same?

$4.$ What is the coupon of the bond if bond value is $1800$ taka while other things in question $1$ remains the same?