thank you

In mid-2012. Ralston Purina had AA rated, 10-ynar bonds outstanding with a yield to maturity of 1.58% a. What is the highest expected return these bands could have? b. At the time, similar maturity Treasures had a yield of 0.50%. Could these bonds actually have an expected retum equal to your win para c. If you believe Ralston Purina's bonds have 0.7% chance of default per year, and that expected low rate in the event of de tout le 53%, what is your estimate of the expected retum for those bonda? a. What is the highest expected return these bonds could have? The highest expected return these bonde could have is I (Round to wo deomal places)