Exercises Closing prices for SilTech and New Mines for the years 1999-2014 are shown belovw a. Calculate the total returns for each stock for the years 2000-2014 to three decimal 8-1 places. Note that the price for 1999 is used to calculate the return for 2000 b. Assume that similar returns will continue in the future (i.e., average returns - expected returns). Calculate the expected return, variance, and standard deviation for both stocks and insert these values in the spreadsheet. Use Average, Var, and STDEV functions Spreadsheet Exercises 219 c. Calculate the covariance between these two stocks based on the 15 years of d. Using the 11 different proportions that SilTech could constitute of the portfolio returns. ranging from 0 to 100 percent in 10 percent increments, calculate the portfolio variance, standard deviation, and expected return. Plot the trade-off between return and risk for these two stocks based on the calcu- lation in (d). Use the XY scatter diagram in Excel. e. SilTech NewMines 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 98.08 84.84 71.89 32.2 10.69 7.16 0.95 7.44 25.7 10.23 3.28 5.22 7.97 9.64 7.13 14.39 21.634 34.867 44.67 49.8 49.55 46.86 53.11 48.75 63.12 37.04 31.67 21.78 14.45 9.39 14.99 10.72 2003 2002 2001 2000 1999 8-2 You are trying to decide whethar ta