Hello, can you help me with the question c) please ?

Lenovo uses the ZX-81 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): b) Using a 3-month movina averaca the forecast for nerinds 11 and 12 is (mund vour resnonses to two decimal nlacesl: 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): 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 through December is $ (round your response to three decimal places)