b) Using a 3-month moving average, the forecast for periods 11 and 12 is (round your responses to two decimal places): c) The mean absolute deviation based on a 2-month moving average of March through December is $ (round your response to three decimal places). The mean absolute deviation based on a 3-month moving average of April throubh December is $0.1513 (round your response to three decimal places). Lenovo uses the ZX81 chip in some of its laptop computers. The prices for the chip during the last 12 months were as follows: This exercise contains only parts a,b, and c. a) Using a 2-month moving average, the forecast for periods 11 and 12 is (round your responses to two decimal places)