Of the five members standing in a row R is to the right of U but to the left of Q. P is to the right of Q but to the left of S. Find the member in the middle of row.

We can draw a figure ,
According to question,R is to the right of U but to the left of Q. P is to the right of Q but to the left of S.
From given figure ,it is clear that the memberQ is in the middle of row .
Sitting arrangement :-