There are three consecutive steps in a customer service process. the first two steps are each capable of serving 25 customers per hour while the third step can process only 20 customers per hour. which of the following statements regarding this system is true?
(a) the entire system is capable of processing 25 customers per hour.
(b) there are floating bottlenecks in the system.
(c) if the first two steps are run at full capacity, then the third step has a waiting line.
(d) the first and second steps are bottlenecks for the system.

Wo firms, a and b, each currently dump 50 tons of chemicals into the local river. the government has decided to reduce the pollution and from now on will require a pollution permit for each ton of pollution dumped into the river. it costs firm a $100 for each ton of pollution that it eliminates before it reaches the river, and it costs firm b $50 for each ton of pollution that it eliminates before it reaches the river. the government gives each firm 20 pollution permits. government officials are not sure whether to allow the firms to buy or sell the pollution permits to each other. what is the total cost of reducing pollution if firms are not allowed to buy and sell pollution permits from each other? what is the total cost of reducing pollution if the firms are allowed to buy and sell permits from each other? a. $3,000; $1,500 b. $4,500; $3,500 c. $4,500; $4,000 d. $4,500; $2,500