Logical Reasoning and Problem Solving

Directions: The question below is followed by two statements labelled (I) and (II). You have to decide whether the data provided in the statements is sufficient to answer the question.

How many people are sitting between P and Q?
Statements:
(I) P and Q are sitting eleven places from the right end and tenth from the left end, respectively.
(II) R and T occupy tenth place from the left end and thirteenth place from the right end, respectively.