Problem 8-3 Simple Moving Averages (L04, CFA1) The table below shows the closing monthly stock prices for IBM and Amazon. Calculate the simple three-month moving average for each month for both companies. (Input all amounts as positive values. Do not round intermediate calculations. Round your answers to 2 decimal places.) January February March April May June July August September October November December IBM $ 171.44 174.49 183.91 199.80 195.25 205.87 226.51 211.54 217.67 213.87 193.64 173.94 AMZN $ 604.71 616.64 582.53 545.30 522.78 502.78 604.59 539.61 514.26 595.67 596.78 649.20 IBM AMZN March April May June July August September October November December