Consider the simple $3-$station assembly line illustrated below, where the $2$ machines at Station $1$ are parallel, i$.$e$.,$ the product only needs to go through one of the $2$ machines before proceeding to Station $2.$ What is the bottleneck time of this process?Question $21$ Select one:a$\mathrm{.}38$ min.b$\mathrm{.}6$ min.c$\mathrm{.}12$ min.d$\mathrm{.}20$ min.e$\mathrm{.}10$ min