The Pullman Mfg$.,$ Inc. three$-$station work cell illustrated in the figure below has two machines at station $1$ in parallel. $($The product needs to go through only one of the two machines before proceeding to station $2.)$ The manager, Ms$.$ Hartley, has asked you to evaluate the system if she adds a parallel machine at station $3.$ b$)$ The bottleneck time of the new work cell is