An Australian company manufactures computer disks in China. The last stage of the manufacturing process is the application of a special coating. Disks arrive for coating at a machine at an average rate of one every 6 seconds. The machine coats them at a constant rate of 5 seconds per disk. The arrival rate follows a Poisson distribution.
a. The disks arrive at the machine at a rate of:
b. On average how many minutes would a disk be in the queue?
c. On average, how many disks would be in the queue?
d. What is the percentage idle time of the machine?