You purchased 1, 000 share of stock X three year ago for $29 per share, and the stock price has changed by the end of each year till last year as follows, assume no dividend paid during these years: What was your holding-period return for last three years? What was your annual internal rate of return? What is the standard deviation of returns of your investment? If stock Y has a same average return but the standard deviation of returns is 20%, which stock is a better investment