Sid Das Brick Distributors in Jamaica currently employs 1 worker whose job is to load bricks on outgoing company trucks. An average of 24 trucks per day, or 3 per hour, arrive at the loading platform, according to a Poisson distribution.

The worker loads them at a rate of 4 trucks per hour, following approximately the exponential distribution in his service times.

Das believes that adding an additional brick loader will substantially improve the firm’s productivity. He estimates that a 2-person crew loading each truck will double the loading rate

(m) from 4 trucks per hour to 8 trucks per hour. Analyze the effect on the queue of such a change, and compare the results to those achieved with one worker. What is the probability that there will be more than 3 trucks either being loaded or waiting?