Consider a clinic that is a single server queue $($it follows the First$-$In and First$-$Out rules$).$ Let$$s consider the time frame from t$=0$ to t$=10.$ Customers$$ arrivals and service times are given below $(15$ pts$)$

Customer ID Arrival time $($min$)$ Service time $($min$)$

$113$

$234$

$341$

$453$

$($i$).$ Find the service start time for Customer ID$=3.(5$ pts$)$

$($ii$).$ Calculate the total busy time $(5$ pts$)$

$($iii$).$ Calculate the mean waiting time $(5$ pts$)$