Sales of hair dryers at the Walgreens stores in Youngstown, Ohio, over the past 4 months have been 100, 110, 120, and 130 units (with 130 being the most recent sales) Develop a moving average forecast for next month, using these three techniques a) 3-month moving average b) 4-month moving average c) Weighted 4-month moving average with the most recent month weighted 4, the preceding month 3, then 2, and the oldest month weighted 1 d) If next month's sales turn out to be 140 units, forecast the following month's sales (months) using a 4-month moving average