A beauty salon hires three hairdressers. Each customers get their hair washed in one area of the saloon before being taken to another area to get their hair cut. Customer arrival rate as well as service time follows the Poisson and exponential distributions respectively. What is the Kendall notation for this system?
a)M/M/1
b)D/M/3
c)M/G/3
d) M/M/3