$($b$)$ A coupon bond maturing in one year has a face value of Rs $1000$ and a coupon rate of $8\%.$ If the market interest rate is $6\%$ at the time of purchase, calculate $($a$)$ price $($b$)$ current yield c$)$ yield to maturity of this bond. What effect would a rise in the market rate of interest to $10\%$ have on its price and yield?