Calculate the unit price $($value$)$ of the bond issued$/$traded having an annual gross coupon rate of interest of $20\%,3$ years of maturity, and a Par value of TL $1,000.$ Market rate of return for the similar risk group of bonds is given as $15\%.$ Witholding tax $($stoppage$)$ is $10\%.($Note: Use $2$ digits in solving your problems$)$

b$)$ Calculate the bond's Approximate Yield to Maturity $($YTM$)$