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.) IBM AMZN $174.44 611.96 622.04 575.48 547.30 512.38 496.78 606.09 537.36 512.96 600.72 592.43 654.70 January February March April May June July August September October November December 176.49 190.21 206.45 192.85 208.17 233.16 205.39 220.07 214.47 195.89 175.34 IBM AMZN March April May June July August September October November December