would you please

clarify if you used a excel format or calculator

6. Professor's Annuity Corp. offers a lifetime annuity to retiring professors. For a payment of $350,000 at age 65, the firm will pay the retiring professor $3,750 a month until death. If the professor's remaining life expectancy is 25 years. What is the effective annual rate (EAR)? (7') 7. On the issue date, you bought a 20-year maturity, 5.25% semi-annual coupon bond. The bond then sold at YTM of 6.25%. Now, 4 years later, the similar bond sells at YTM of 7%. 4 If you hold the bond now, what is your realized rate of return for the 4-year holding period? (8')