Please answers the following questions in your case studies. 1. Wilkins case Please submit a report addressing the questions below. Note: attached you can find the data of the case exhibits: 1. How accurate was Wilkins demand forecast for the rst quarter of 2005? Use the forecast error and MAPE to calculate forecast accuracy. Calculate the accuracies for the fire valves and PVBs aggregate family of products as well as for each product of both families individually. Note: to disaggregate the product family forecast into the individual products use the planning bill % of Exhibits 3 and 4