Between Dalton, Georgia and Valdosta, Georgia all trucks traveling along Interstate 75 from 9:00AM to 5:00PM are require

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Between Dalton, Georgia and Valdosta, Georgia all trucks
traveling along Interstate 75 from 9:00AM to 5:00PM are required to
stop at a weigh station. Trucks arrive at the station at a
rate of 200 per 8 hour day, and the station can weigh, on average,
220 trucks per 8 hour day.
a-determine the average number of trucks waiting
b-determine the average time, in minutes, spent in the
system
c-determine the average time, in minutes, spent waiting
If truck drivers find out they must remain at the weigh station
longer than 15 minutes, on average, they will start taking a
different route or traveling at night, thus depriving the state tax
revenues. The state estimates it loses $10,000 per year in taxes
for each extra minute trucks must remain at the weigh
station. An addition scale can be installed for a cost of
$50,000 per year.
d-explain why the state should or should not install the
additional scale.