A stable process has six steps in it$,$ A$,$ B$,$ C$,$ D$,$ E$,$ and F

Each step has a queue in front of it$.$

Flow units arrive at Step A at the rate of $11$ flow units per hour.

After Step A

$35\%$ go to Step B$.$

$35\%$ go to Step C

and the remainder go to Step D

After Step B$,$

$65\%$ go to Step D

and the remainder go to Step E$.$

After Step C$,$

$75\%$ go to Step D

and the remainder go to Step F$.$

After Step D

$55\%$ go to Step E

and the remainder go to Step F$.$

After Step F

$100\%$ exit

The number waiting to start Step A $=1\mathrm{.}5$ the average processing time at Step A $=7$ minutes.

The number waiting to start Step B $=0\mathrm{.}75$ the average processing time at Step B $=9$ minutes.

The number waiting to start Step C$=1\mathrm{.}5$ the average processing time at Step C $=11$ minutes.

The number waiting to start Step D$=1\mathrm{.}5$ the average processing time at Step D $=12$ minutes.

The number waiting to start Step E$=1\mathrm{.}5$ the average processing time at Step E $=13$ minutes.

The number waiting to start Step F$=2\mathrm{.}5$ the average processing time at Step F $=14$ minutes.