solution and method for part c and d please

Mithril Capital had the following six end-of-year share prices: 2015 2016 2017 2018 2019 2020 Price $43.23 $49.23 $33.89 $59.29 $54.04 $66.39 A) Using only the above information, what was the arithmetic average annual return on the Mithril Capital's stock over the 2015-2020 period? 14.33 % (Round to two decimal places) Your last answer was interpreted as follows: 14.33 Correct answer, well done. Marks for this submission: 2.67/2.67. Assume that Mithril Capital also paid the following end-of-year dividends to shareholders (which should be reflected in each of your answers to the remaining questions below): 2015 2016 2017 2018 2019 2020 Dividend $3.44 $4.78 $4.94 $3.33 $3.85 B) What is your new estimate of the Mithril Capital's arithmetic average stock return over this period? | % (Round to two decimal places) Incorrect answer. HINT: The process of calculating the arithmetic average of the set of retums is the same as in the earlier arithmetic average question, but each individual return should reflect both the capital gain on the share price and the dividend yield that has been earned over the period. Marks for this submission: 0.00/2.67. What was the standard deviation (i.e. volatility) of Mithril Capital's stock returns over this period? % (Round to two decimal places)