A firm's demand data from the last two quarters is displayed in the table. Use a three-period weighted moving average forecast with weights Wt = 0.6, Wt-1 = 0.3, and Wt-2 = 0.1 to forecast demand for July. Month Demand January 154 February 148 March 214 April 180 May 225 June 246 O 194.5 O 233.1 O 200.1 O 217.0