< Christmas Express makes wreaths in batch sizes of 21. The cutting and assembly process takes 4 minutes per wreath, and the decorating process time is 9 minutes per wreath. It takes 3 minutes to move the wreaths from the cutting and assembly process to the decorating process. a. Compute the value-added, non-value-added, and total lead times of the wreath process. Value-added lead time Non-value-added lead time: Move time Within-batch wait time Total lead time minutes minutes b. Compute the value-added ratio. Round to one decimal place.