Consider the following process flow diagram for bread$-$making. Raw material is made into bread $($at a

speed of $40$ breads$/$hr$)$ and then packed $($at a speed of $30$ breads$/$hr$)$ and put in finished goods

inventory. There is a work$-$in$-$process $($WIP$)$ buffer with unlimited space between Bread$-$making and

Packing.

a$.$ What is process bottleneck and capacity $(20$pts$)?$