Easy finance homework

Hey guys I have these questions I really need help answering. Most of them can be looked up online but I’m sick and have so much to do. Please help!
2. Suppose you buy a 7 percent coupon, 20-year bond today when it’s first issued. If interest rates suddenly rise to 15 percent, what happens to the value of your bond? Why? 3. Even though most corporate bonds in the United States make coupon payments semiannually, bonds issued elsewhere often have annual coupon payments. Suppose a German company issues a bond with a par value of € 1,000, 23 years to maturity, and a coupon rate of 5.8 percent paid annually. If the yield to maturity is 4.7 percent, what is the current price of the bond? 4. A Japanese company has a bond outstanding that sells for 91.53 percent of its ¥100,000 par value. The bond has a coupon rate of 3.4 percent paid annually and matures in 16 years. What is the yield to maturity of this bond? 5. Essary Enterprises has bonds on the market making annual payments, with eight years to maturity, a par value of $1,000, and selling for $948. At this price, the bonds yield 5.9 percent. What must the coupon rate be on the bonds? 6. Sqeekers Co. issued 15-year bonds a year ago at a coupon rate of 4.1 percent. The bonds make semiannual payments and have a par value of $1,000. If the YTM on these bonds is 4.5 percent, what is the current bond price?7. Heginbotham Corp. issued 20-year bonds two years ago at a coupon rate of 5.3 percent. The bonds make semiannual payments. If these bonds currently sell for 105 percent of par value, what is the YTM?8. DMA Corporation has bonds on the market with 14.5 years to maturity, a YTM of 5.3 percent, a par value of $1,000, and a current price of $965. The bonds make semiannual payments. What must the coupon rate be on these bonds?