2010014204

Find the distance between parallel lines $p$ and $q$ given by their parametric equations. $$\begin{array}{rlrl}p:x& =3-2t,& q:x& =2+2s,\\ y& =-1+t;t\in \mathbb{R};& y& =1-s;s\in \mathbb{R}.\end{array}$$