Please see attached! I think it's easier than I'm making it. I need to see the work done to get it or the formulas used in excel.

1) The following data is an annual price history (ignores dividends) for GE, Amazon and the S&P500 index. Note: this data table can be highlighted (using shift-key) and pasted into Excel. Assume the risk free rate was zero. 1/4/201 6 1/2/201 5 1/2/201 4 1/2/201 3 1/3/201 2 1/3/201 1 1/4/201 0 1/2/200 9 1/2/200 8 1/3/200 7 1/3/200 6 GE AMZN S&P 30.50 587.00 1940.24 22.91 354.53 1994.99 23.28 358.69 1782.59 19.99 265.50 1498.11 16.18 194.44 1312.41 16.83 169.64 1286.12 13.07 125.41 1073.87 9.38 58.82 825.88 25.95 77.70 1378.55 25.67 37.67 1438.24 22.64 44.82 1280.08 a. Using this data, calculate the average return of the AMZN and GE over this ten year time period. b. Use the data to estimate the annual volatility of the AMZN and GE. c. Estimate beta for GE and AMZN during this time period