In the Parallel Batching example of Week$10$B $($page $10),$ the parallel batching requires a batch size greater than $4\mathrm{.}5$ to maintain a stable system. If we use batch size k $=5,$ what would be the utilization?

In the Parallel Batching example of Week$10$B $($page $10),$ the parallel batching requires a batch size greater than $4\mathrm{.}5$ to maintain a stable system. If we use batch size k $=5,$ what would be the utilization?

$0\mathrm{.}7$

$0\mathrm{.}8$

$0\mathrm{.}9$

$0\mathrm{.}98$