Question $8$:

If the relevant cost of capital is $10\%$ throughout, what are the current market values of the following bonds with a face value of $100?$

a$)$ An irredeemable $($perpetual$)$ bond with a $3\mathrm{.}5\%$ coupon?

b$)$ A zero$-$coupon bond which will be redeemed at par in $8$ years time?

c$)$ A bond with a coupon of $5\%$ which is to be redeemed at par in $5$ years$$ time?

d$)$ A bond which will pay an $8\%$ coupon starting three years from now up until redemption in year $20?$