The figure below shows the 1-year return distribution for RCS stock. The expected return is 6.5%. Calculate the standard deviation of the return.

- X i Graph/Chart 35 30- de 25- 20- Probability % 15- 10- 5- B D E 0 A A: -30% return B: -10% return C: 0% return D: 10% return E: 30% return