I am currently confused about these questions. please help me to figure out these questions. thanks

One company has two outstanding publicly traded bonds. The two bonds will both mature in ten years and have the same coupon rate. One of the bonds has a sinking fund; the other one does not. Which bond will have the higher yield to maturity today? The bond with the sinking fund The bond without the sinking fund It depends on the shape of the yield curve OBoth bonds will have the same YTM because they were issued by the same company XYZ stock currently trades at a price of $41 a share. Investors also have the ability to purchase either a call option or a put option on XYZ stock. Both options both have an exercise price of $40, and they both expire one year from today. The options are both European options (they can only be exercised on the expiration date), and XYZ stock does not pay a dividend. If the risk-free interest rate is 3%, and the put option sells for a premium of $7, the (no-arbitrage) price of the call option is (rounded to the nearest $): $8 $6 $7 $9 $10