Pepito's is a very popular hair salon. It offers high$-$quality hairstyling and physical relaxation services at a reasonable price, so it always has unlimited demand$)$ The service process includes$($five activities$)$ that are conducted in the sequence described next $($the time required for each activity is shown in parentheses$)$:

Activity $1$: Welcome a guest and offer homemade herb tea $(12$ minutes$).$

Activity $2$: Wash and condition hair $(15$ minutes$).$

Activity $3$: Neck, shoulder, and back stress$-$release massage $(23$ minutes$).$

Activity $4$: Design the hairstyle and do the hair $(22$ minutes$).$

Activity $5$: Check out the guest $(2$ minutes$).$

Three service employees $(S1,S2,$ and $S3)$ offer the services in a worker$-$paced line. The assignment of tasks to the service employees is the following: $S1$ does activity $1,S2$ does activities $2$ and $3,$ and $S3$ does activities $4$ and $5.$ FR$/$Cap formula that uses LC and Total Idle time$)(10$ Points$)$

$\frac{2\mathrm{.}6087}{2\mathrm{.}6087}=1$