Please show all work, no Excel.

Use the following information for WGU, Inc. to answer questions 21 and 22 Year Annual Stock Return 2010 8% 2011 -16% 2012 23% 2013 38% 2014 2% 2015 -14% 2016 -7% 2017 12% 2018 18% 2019 9% 2020 34% 21. What is the expected return for WGU, Inc. stock (i.e., the average of all returns from 2010 through 2020)? 22. What is the standard deviation of returns for WGU, Inc. stock over the 11 year time period? (Compute the standard deviation assuming this is a population of returns, not a sample - that is, use the procedure described in the textbook for calculating the standard deviation of a series of stock returns)