The following table shows the process times in minutes $($or minutes$/$unit $-$ how many minutes to process one unit$)$ of a six$-$station serial production line $(1-2-3-4-5-6).$

$\backslash$table$[[$Station$,$Process Time $($minutes$/$unit$)],[1,8],[2,11],[3,7],[4,7],[5,11],[6,4]]$

Which station$($s$)$ is $($are$)$ the bottleneck$($s$)?$

Station $2$

Station $5$

Stations $2$ and $5$

Stations $3$ and $4$