Consider a worker$-$paced line with three steps, each of which is staffed with one worker. The processing times are $3$ minutes per item for step $1,4$ minutes per item in step $2$ and $5$ minutes per item in step $3.$

If the process is operated as a pull system, what is true about the utilization of the workers in steps $1,2$ and $3?$

$-$ Utilization of worker $1=$ Utilization of worker $2=$ Utilization of worker $3$

$-$ Utilization of worker $1>$ Utilization of worker $2>$ Utilization of worker $3$ Utilization of worker $1<$ Utilization of worker $2<$ Utilization of worker $3$