An extremely important concept in queueing models is the difference between rates and times. If  a rate (customers per hour, say), then argue why  is a time and vice versa. Explain the basic...

An extremely important concept in queueing models is the difference between rates and times. If
 a rate (customers per hour, say), then argue why
 is a time and vice versa.

Explain the basic relationship between the exponential distribution and a Poisson process. Also, explain how the exponential distribution and the Poisson distribution are fundamentally different. (Hint: What type of data does each describe?)