Can someone please explain how to do these problems?

Question 5 A zero-coupon bond with a par value of $1,000.00 has a current market value of $543.00. If the bond has 6 years to maturtiy, what is its current yield? 6.82% 0 000% O 6.87% 0 6.37% 0 6.97% Question 6 , hat s its current e ? 0lf the bond has 17 ears to matun al yield to maturity of 580 % and a current price of S98 A bond with a par value of $1.000 00 and a sem annual coupon has a nom 0 5.98% 0 628% 0 0.00% 0 5.73% 6.19% Question 7 A bond with a par value of $1,000.00 and a coupon rate of 9.25% has a current yield of 7.50%. What is its yield to maturity? The bond has 7 years to maturity. o 5.19% 0 5.42% o 5.55% O 5.09% O 5.37%