Question $4(2$ points$)$

BionMed, a biomedical technology and research laboratory, produces a standard blood

filtering device on an assembly$-$line basis. The time to perform each task and the tasks that

must immediately precede each task are in the table below. Forty pumps per $450-$minute day

must be produced by the assembly line. What is the efficiency of an assembly line designed

based on the decision rule of assigning the task that takes the longest first?

$1$

$1\mathrm{.}9$

$0\mathrm{.}62$

$0\mathrm{.}5$

$0\mathrm{.}38$