Hi there! I'm working on my AR and am having a hard time understanding this question and how to set up. Would appreciate any support.

The questions in this exercise are based on the set of conditions described below. You may find it useful to draw a rough diagram.

Beginning of reading passage.

A train makes five trips around a loop through five stations—P, Q, R, S, and T, in that order—stopping at exactly three of the stations on each trip. The train must conform to the following conditions:

The train stops at any given station on exactly three trips, but not on three consecutive trips.

The train stops at any given station at least once in any two consecutive trips.