The owner $/$ operator of the local franchise of Handyfix, Inc., has four jobs to do today, shown in the order they were received:

?

Job Processing Time $($ hours $)$ ?Due $($ hours $)$

W $44$

X $35$

Y $22$

Z $11$

If the owner uses the shortest processing time first $($ SPT $)$ ?priority rule to schedule these jobs, what will be the average WIP in the shop today?

Multiple Choice

$3$ ?jobs

$2$ ?jobs

$0$ ?jobs

$4$ ?jobs

$1$ ?job