$2\mathrm{.}16$ Given the figure below, operation $4$ represents a rework operation on parts that fail in spection upon completion of

$2\mathrm{.}17$ Given the information in Problem $2\mathrm{.}16$ and the information in the table below, how many machines are needed to perform each operation $($round up to nearest integer$)?$ Assume operations $1,2,$ and $3$ run for $16$ hours per day, five days per week. Machine $4$ is available for eight hours per day, five days per week.

$\backslash$table$[[$Operation$,$Standard Time,Efficiency,Reliability$],[1,3$ min,$100\%,95\%$