An amusement park roller coaster includes five cars sequentially numbered 1 through 5. Each car accommodates at most two riders, seated side by side. Six people, Tareq, Galib. Luna, Mark, Pavel and Jamil, are riding the coaster at the same time. Luna is sharing a car. Mark is not sharing a car and is seated immediately behind an empty car. Tareq is not sharing a car with either Galib or Pavel. Galib is riding in either the third or fourth car. If Pavel is riding in the second car, which of the following statements (s) must be correct?