$5$ Solve the preceding problem but assume that all loads enter the factory through department $1$ and exit the factory through department $4.$Therefore, there is no need to transportthe $25$ loads from department $4$ back to department $1.$ However, the forklift trucks muststill return from department $4$ to department $1$ so that they can make deliveries that originate at department $1.$ This means that $25$ empty moves must be made from department $4$to department $1.$ The distance remains the same $250$ ft$.$