Please help with 1-3 using financial calc or formulas not excell thank you!

1. Ninja Co. issued 20-year bonds a year ago at a coupon rate of 5.5 percent. The bonds make semiannual payments. If the YTM on these bonds is 6.9 percent, what is the current bond price? 2. Both Bond Sam and Bond Dave have 7 percent coupons, make semiannual payments, and are priced at par value. Bond Sam has 3 years to maturity, whereas Bond Dave has 20 years to maturity. If interest rates suddenly rise by 2 percent, what is the percent change in the price of Bond Sam? Of Bond Dave? If rates were to suddenly fall by 2 percent instead, what would the percentage change in the price of Bond Sam be then? Of Bond Dave? What does this problem tell you about the interest rate risk of longer-term bonds? 3. Coccia Co. wants to issue new 20 year bonds for some much-needed expansion projects. The company currently has 7 percent coupon bonds on the market that sell for $1,125, make semiannual payments, and mature in 30 years. What coupon rate should the company set on its new bonds if it wants them to sell at par