Lead Time board assembly time. After each batch is completed, the operator moves the assembled boards to the final assembly area. This move takes $9$ minutes to complete. these two operations. Packaging and labeling requires $10$ minutes per unit. Required: percentage to one decimal place. $2.$ Move time in this process could best be reduced by: a$.$ Doing nothing. b$.$ Changing the layout from a process orientation to a product orientation. c$.$ Increasing batch sizes. d$.$ Eliminating the testing step. e$.$ Hiring more workers.