The S&P TSX Composite index delivered annual returns of 17.61%, -8.71%, 7.19% and 12.99% from Year 1 to Year 4. What is a 68% confidence interval for next year's expected return (year 5)? O -4.2% to 18.7% 4.2% to 11.5% O 6.9% to 7.6% 7.3% to 11.5% 0-2.7% to 17.2%