Solve the following math problem step by step. The last line of your response should be of the form Answer: \boxed{$Answer} where $Answer is the answer to the problem.

<image>If $\overline{P Q} \cong \overline{Q S}$, $\overline{Q R} \cong \overline{R S}$, and $m \angle P R S=72$, what is the measure of $\angle Q P S$ ?