Hi, i need help on these 3 equationsConsider a $1,000 par value bond with a 6% coupon rate

Hi, i need help on these 3 equations

Consider a $1,000 par value bond with a 6% coupon rate

paid semiannually, and has 9 years to maturity. What is the price of the bond if it is priced to yield 7%? 

Linebacker Co. has 7 percent coupon bonds on the market with 9 years left to maturity. The bonds make annual payments. If the bond currently sells for $1,080, what is its YTM?

Caribbean Reef Software has 8.4 percent coupon bonds on the market with 9 years to maturity. The bonds make semiannual payments and currently sell for 95.5 percent of par. What is the YTM?