Look at the figure and mark the acute angle as $a$, obtuse angle as $b$, and right angle as $c$. How many right angles are there in this figure?

  

Mark the figures which are quadrilaterals:

In the given figure, $PQRS$ is a parallelogram with $\angle SPQ=80°$ and $\angle SQR=45°$. Find the measure of $\angle RSQ$ and $\angle PSQ$.