please show steps for both problems! thank you!

Question 8 10 pts Assume the that over the past couple of years your investment into a stock that pays no dividends was as follows: Year Starting price Shares bought/sold 2010 49.6 50 bought 2011 55.9 100 bought 2012 50.9 150 sold What is your dollar-weighted annual return for over this period for this investment? Enter answer in percents, to two decimal places. Bonus exploratory question: how does this compare to the average annual return, or the geometric average annual return? Question 10 10 pts Given the following information about a stock's return in the various states of the economy, calculate the standard deviation of its return. State of economy Probability Stock return Recession 0.14 -0.13 Normal 0.43 0.04 Boom 0.22 Enter answer in percents, accurate to two decimal places