I have done $1-3$ i just need help with $4-8$ Money Laundry has $21$ washers and $30$ dryers. All orders are first sent to wash and then to dry. It takes, on average, $45$ minutes to wash one order and $38$ minutes to dry.

$1.$ What is the capacity of the washing stage? $28$

Note: Round your answer to $2$ decimal places.

$2.$ What is the capacity of the drying stage? $47\mathrm{.}36$

Note: Round your answer to $2$ decimal places.

$3.$ What is the capacity of Money Laundry? $28$

Note: Round your answer to $2$ decimal places.

The manager, Mr$.$ Money, decided not to buy a machine. He still has $21$ washers and $30$ dryers. The manager estimates that, on average, Money Laundry receives two orders every hour. The manager also finds that, on average, there are two orders in the washing stage and three orders in the drying stage.

$4.$ What is the utilization of washers, on average?

Note: Round your answer to $2$ decimal places.

$5.$ What is the utilization of dryers, on average?

Note: Round your answer to $2$ decimal places.

$6.$ On average, how long does it take an order to finish the washing process, from the time the order is received?

Note: Round your answer to $2$ decimal places.

$7.$ On average, how long does it take an order to finish the drying process, from the time the order finishes the washing process?

Note: Round your answer to $2$ decimal places.

$8.$ On average, how long does an order stay in Money Laundry?

Note: Round your answer to $2$ decimal places.