Lap trinh mo phong ve tia phan giac

   !"#$%&'()*+,-. /0123456789:;<=>?@ABCDEFGH6IJKLMN OPQR STUQV+WXY XZ[M\]3Q^_`N_ aabc`defgh.i)jklm$no p.q`c r s tuvwxy?z{M|}~)^o pWBnJ3>Dc02I04{7HyF>][m3%`68o (^<5`B3Saiv:" ZĂ>ÂzEOÊ/^ÔƠƯĐ[ăâ?COFAêôkRơ^yTG-]đc