Problem $2$

Cigerci Bedo $($CB$)$ is a popular kebab restaurant in Cukurambar, Ankara. The restaurant is famous with its delicious $"$ci$$er $$i$",$ but it also serves a variety of kebap and traditional Turkish cuisine including, adan a kebap, d$$ner$,$ beyti, mant etc. Recently, they have attracted an increasing number of customers which led to some capacity problems and waiting lines. The manager of $CB$ is concerned with the waiting times of the customers and is looking for a solution.

During week days CB attracts a huge amount of dem and during lunch time between $11AM$ to $2PM.$ And, it is common for customers to wait in the line to be seating during this period. The company observed that, on average, they receive $50$ customers per hour during this busy period. The coefficient of variation of the interarrival times of the customers is $1.$

Currently, CB has $26$ tables to serve its customers $($assume that each table serves a single customer$),$ and on average one customer lunches for $30$ minutes with a standard deviatien of $15$ minutes $($i$.$e$.,$ the coefficient of variation of the service times is $0\mathrm{.}5).$

Based on these operational parameters please answer the following questions.

$1$