Could someone please explain how to do these? I'm having a hard time trying to understand how to solve these

8. A perpetual bond with a par value of $1000 and a coupon rate of 7.25% (semiannual coupon) has a nominal yield maturity of 5.2%. What is current yield?

9. A bond with a par value of $1000 and a corporate bond rate at 8.25% semiannual, has a current market value of $905 what is its nominal yield to maturity? The bond has 7 years to mature

10. A bond with a par value of $1000 and a coupon rate of 8.25% (semiannual coupon) has a nominal yield to maturity at 6.7%. If the bond has 15 years to mature what is its current yield

Question8 2 pts A perpetual bond with a par value of $1,000.00 and a coupon rate of 7.25% semiannual coupon has a nominal yeld to maturity of 5.20%. What is its current yield? 0 520% 0 498% 512% 0 507% 0 000% Question 9 A bond with a par value of $1,000.00 and a coupon rate of 8.50% (semiannual coupon) has a current market value of $905.00. What is its nominal yield to maturity? The bond has 7 years to maturity. 9.95% 0 11.26% 0 10.56% 1045% 0 11.16% Question 10 2 pts A bond with a par value of S 1 0 00 and a coupon rate of 8.25% semiannual coupon has a nominal y eld to maturity of 6.70%, lf the bond has 15 years to maturity, what is its current yield 704% 0 720% 0 0.00% 709% 700%