Given the following data, use least-squares regression to derive a trend equation: The least-squares regression equation that shows the best relationship between demand and period is (round your responses to two decimal places): y^=+x, where y^= Demand and x= Period. a) Based on the given monthly sales data, it can be said that there is linear trend in sales over time. b) First, co-owner Bob Day wants to forecast by exponential smoothing by initially setting February's forecast equal to January's sales with =0.20. Using the forecasting method, Bob's forecast for the month of May is (round your response to two decimal places): Second, co-owner Sherry Snyder wants to forecast using a three-period moving average. The forecast for the month of May is (round your response to two decimal places)