Under the current process layout, workers are allocated to the stations as shown here:

$$ Worker $1$: Steps $1$ and $2$

$$ Worker $2$: Steps $3$ and $4$

$$ Worker $3$: Step $5$

$$ Worker $4$: Step $6$

$$ Worker $5$: Step $7$

a$.$ What is the bottleneck in this process?

b$.$ What is the capacity of this assembly line, in finished units$/$hour$?$

c$.$ What is the utilization of Worker $4?$

d$.$ What is the average labor utilization of the workers?