An investor wants to find the duration of a(n) 10-year, 8% semiannual pay, noncallable bond that's currently priced in the market at $770.60, to yield 12%. Using a 150 basis point change in yield, find the effective duration of this bond

The new price of the bond if the market interest rate decreases by 150 basis points (or 1.5%) is? The new price of the bond if the market interest rate increases by 150 basis points (or 1.5%) is ? The effective duration of the bond is ?