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