i need help with part b the naive method.

thank you

Sales of quilt covers at Bud Banis's discount department store in Carbondale over the past year are shown below. Management prepared a forecast usir combination of exponential smoothing and its collective judgment for the 4 months (March, April, May, and June): a) MAD for the forecast developed by the management's technique = sales (round your response to two decimal places). MAPE for the forecast developed by the management's technique =% (round your response to two decimal places). b) Using the the forecast for period March through June is (round your response to two decimal places)