Could you solve these problem without an excel calculation? Thanks in advance.

7-1. (Bond valuation) Trico bonds have an annual coupon rate of 8 percent and a par value of $1,000 and will mature in 20 years. If you require a return of 7 percent, what price would you be willing to pay for the bond? What happens if you pay more for the bond? What happens if you pay less for the bond? 7-2. (Bond valuation) Sunn Co.'s bonds, maturing in 7 years, pay 4 percent interest on a $1,000 face value. However, interest is paid semiannually. If your required rate of return is 5 percent, what is the value of the bond? How would your answer change if the interest were paid annually