Isascson Dental Inc. is considering a new lean product cell. The present manufacturing approach produces a product in four separate steps. The production batch sines are 50 units, The process time for each step is as follows: The time required to move each batch between steps is 6 minutes. In addition, the time to move row materials to Process 5 tep 1 is also 6 minutes, and the time to mov completed units from Process Step 4 to finished goods inventory is 6 minutes. The new lean layout will allow the company to reduce the batch sizes from so units to 2 units. The time required to move each batch between steps and the imventory locations will be reduced to 1 minute. The processing time in each step will stay the same. Determine the value-added, non-value-added, and total lead times, and the value-added ratio under the (a) present and ( b ) proposed production approaches. If required, round percentages to one decimal place