The convex shape of the bond price-yield curve shows: 1. For a given change in interest rates, bond price will increase less when rates decrease than they will decrease when rates increase. II. For a given change in interest rates, bond price will increase more when rates increase than they will decrease when rates decrease. III. For a given change in interest rates, bond price will increase more when rates decrease than they will decrease when rates increase. O a. Only III is correct. O b. Only II is correct. O C. Only I is correct O d. All are NOT correct. O e. Insufficient information. We need to know the bond maturity. Clear my choice How long will it take David to triple his investment if he can earn an annual rate of return of 7% (compounded monthly)? It takes David years to triple his investment. (Note: please retain at least 4 decimals in your calculations and at least 2 decimal in the final answer.)