\input basic \output {\page} \magnify {1100} \ctrline {CS154 ASSIGNMENT 3} \vskip 36 pt \parindent 0 pt \ctrline {Assigned Friday, April 15, due Friday, April 22} \vskip 12 pt Do problems 3.1bde, 3.2, 3.3, 3.9, 3.13ab, 3.20 (without proof), 3.28 \par\vfill\eject\end