Taggart Inc.'s stock has a 50% chance of producing a 36% return, a 30% chance of producing a 10% return, and a 20% chance of producing a -28% return. What is the firm's expected rate of return? Do not round your intermediate calculations. a. 15.40% b. 18.00% c. 21.00% d. 24.67% e. 20.60%