<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV id=yiv595654920>Hi,</DIV>
<DIV> </DIV>
<DIV>I was wondering if you could answer this question.</DIV>
<DIV> </DIV>
<DIV>To draw intersection of two sets, I tried this, but it didn't work.</DIV>
<DIV><BR>beginfig(1)<BR>u:=.5cm;</DIV>
<DIV>p1:= fullcircle scaled 4u shifted (.2u,0);<BR>p2:= fullcircle scaled 6u shifted (3u,0);</DIV>
<DIV>fill buildcycle(p1,p2) withcolor (0,1,1);<BR>draw p1;<BR>draw p2;<BR>label(btex $A$ etex, (-u,0));<BR>label(btex $B$ etex, (3u,0));<BR>endfig;</DIV>
<DIV> </DIV>
<DIV>Could you experts tell me what's wrong?</DIV>
<DIV> </DIV>
<DIV>Thanks in advance.</DIV>
<DIV>Steve</DIV></td></tr></table><br>