A.Your stock investment returns were 8%, 12%, and -4% in consecutive years. What is the average return?

. (Use decimals, not percent in your calculation and for your answer. Round your answer to 4 decimal places.)

B. What is the sample standard deviation of your investment's return?

(Use decimals, not percent in your calculations. Round to 5 decimal places in intermediate steps and round to 4 decimal places in the final step.)

C. Using the standard deviation and mean that you just calculated, and assuming a normal probability distribution, what is the probability of losing 3% or more?

%. (Use percent.)