Five years ago, Cookie Corp. issued a bond with 15% coupon rate, semi-annual coupon payments, $1000 face value and 15 years until maturity. The current YTM is 16%. If you sell the bond today (next coupon payment is in 6 months from today), after having owned it for 4 years, what would your capital gain/loss yield? Please show formulas and do not use excel or financial calculator.