You are trying to decide whether or not to buy a bond for $990 that will make one payment for $1,050 four years from today. What is the internal rate of return on the bond’s cash flows? _________您正在尝试决定是否以990美元的价格购买债券,从现在起四年后将以1,050美元的价格进行一次付款。债券的内部收益率是多少?_________