The Robotics Manufacturing Company operates an equipment repair business where emergency jobs arrive randomly at the rate of two jobs per $8-$hour day. The company's repair facility is a single$-$server system operated by a repair technician. The service time varies, with a mean repair time of $2\mathrm{.}9$ hours and a standard deviation of $2\mathrm{.}1$ hours. The company's cost of the repair operation is $$28$ per hour. In the economic analysis of the waiting line system, Robotics uses $$37$ per hour cost for customers waiting during the repair process.

$($a$)$

What are the arrival rate and service rate in jobs per hour? $($Round your answers to four decimal places.$)$

$=$

$=$

$($b$)$

Show the operating characteristics. $($Round your answers to four decimal places. Report time in hours.$)$

Lq $=$

L $=$

Wq $=$

h

W $=$

h

Show the total cost per hour. $($Express the total cost per hour in dollars. Round your answer to the nearest cent.$)$

TC $=$ $