A manufacturer of automobile engines is designing a new Kanban system for engine #$321.$ The demand for #$321$ is $78$ parts per day, and the container can hold $5$ parts at a time. The total processing and waiting time is $3$ days. The manager wants a safety factor $(\backslash$alpha $)$ of $1\mathrm{.}9$ or $190$ percent. How many Kanbans are required in this system? If required, round your answer up to next whole number.

a$.136$

b$.8$

c$.43$

d$.230$