A process has three activities connected in series. The first activity $($A$)$ has a cycle time of $5$ minutes and a lead time of $5$ minutes, the second activity $($B$)$ has a cycle time of $2$ minutes and a lead time of $10$ minutes, the third activity $($C$)$ has a cycle time of $1$minutes and a lead time of $5$ minutes. Each activity is currently manned by $1$person. The process works for $8$ hours in a day and the demand is $120$ per day. How many people should be sufficient for these activities?

$1$ point

$1$

$2$

$3$

$4$