A bond is a debt servicing, par value is 100 yuan, the life cycle of the bond between the due date, the date of issue of the (from) during the period of 5 years, coupon rate of 10% a year, a time when investors are prepared to buy bonds has three years left, some necessary return of 12%, in line with the requirement of the investors in the price of a bond which is below the investors will buy is how much? (simple interest and compound interest)