**TI83** Program file 01/16/07, 11:10‘ ‚RECTS‚€ÝA+B+N+T?…?©^?Ø?BqAƒNH?0S?1J?Ö1?ApJq1‚HU?UpT‚HX?œU+0+U+^?œU+^+UpH+^?œUpH+^+UpH+0?SpH‚^S?ÚJ+N?×1?Ø?Þ*SUM*?ÞS?)