What is the forecast for May based on a three-month weighted moving average applied to the following past demand data and using the weights: .5, .3, and .2 (largest weight is for the most recent data)? Month Demand Forecast January 40 February March April May June 45 45 57 552 60 60 O 78.00 56.10 66.90 75 75 87 61.50 50.00