Problem 3 (4 points): Given the following data on the number of desks sold at a furniture for a 4-period time frame: 280 Period Demand 1 2 300 3 320 4 350 The manager wants to use Weighted Moving Average method to forecast the demand of desk in period 5. The manager refers to the management science textbook, and decides the weights he wants to use is 0.1, 0.2, 0.3, and 0.4. What is the forecasted demand in period 5