Write a simulation program in GPSS language, which simulates the following situation; you are asked to convert the times to seconds and follow the mentioned process with all the necessary blocks and instructions for the simulation in GPSS: There is a queuing system made up of two stations in series. Customers queue to be served at the first station and when they are served at the first station they immediately queue at the second. Customers will queue regardless of the size of the queue at the first station, the same way they behave for the second station. At the first service station, the arrival ratio follows a Poisson distribution with a mean of 18 customers per hour, that is, 1 customer every 3.33333 minutes exponentially, and the service time follows an exponential distribution with a mean of 4 minutes per person. . At the second station, the service time is evenly distributed between 4 and 6 minutes. After being served at the second station, the customer leaves. It is desired to determine the average time that each type of client remains in the system, when simulating the operation of 9 hours of work in a working day in this system.