triangle POR has vertices P(0,12), R(5,0) and O(0,0).there
exists a line l cutting PR and OP at A and B respectively, such
that circles can be inscribed in triangle PAB and quadrilateral
RAB. Also, these circles are tangent to line l at the same point.if
line l passes through (0,8), then the area of quadrilateral AB is
A, find A.