Ten annual returns are listed in the following table.

1	2	3	4	5	6	7	8	9	10
19.9%	16.7%	17%	50%	43.4%	1.3%	16.4%	45.7%	45.1%	4%

(a)

What is the average annual return over the ten-year period (as a percent)?

%

(b)

What is the standard deviation of annual returns over the ten-year period (as a percent)? (Round your answer to two decimal places.)

%

(c)

What is the 95% confidence interval on the return of this stock next year (as a percent) if the past average returns and volatility of returns are unbiased estimators of expected returns and future volatility. (Round your answers to two decimal places.)

% to %