Consider a two$-$station segment of an electronics assembly line. The first station consists of an

automated machine, and the processing times for recent five orders are observed as follows: $(6,6,$

$5,5,6)($minutes$).$ This machine is subject to failures, so $20$ percent of the jobs drop out after the first

station.

The second station is a manual operation for the inspection staffed by a single operator, and the

followings are five operation times $($minutes$)$ observed recently: $(5,6,4,4,4).$ There are no failures

at the second station. Jobs arrive to this segment of the first station at a rate of $10$ jobs per hour.

Determine the bottleneck of this assembly line.