Dothan Inc.'s stock has a 25% chance of producing a 28% return, a 50% chance of producing a 12% return, and a 25% chance of producing a -18% return. What is the firm's expected rate of return? Do not round your intermediate calculations. a. 8.76% b. 6.63% c. 9.27% d. 9.18% e. 8.50%