1-What is the duration of a 9 year zero coupon bond with face value of $1000 and required rate of return of 12%

2-An investor purchases a bond with $1000 par value that matures in 10 years. The coupon rate is 8% and the investor buys the bond 60 days after the last coupon payment, 120 days before the next (Assume 360 days a year). The yield is 6%. Calculate the dirty price of the bond.