at the fair there ae three hamburget stands A, B and C. the fairground is in the shape of a rectangle with dimensions 100m by 50m. the bottom-left hand corner of the field can be regarded as the origin of the coordinate system, with the diagonally opposite corner as (100,50). the hamburger stands are at the points A(20,30) , B (80,30), C (40,10) find the area of the region of the fairground which is closest to: I) stand C ii) stand A