A computer graphics program displays images on a rectangular
screen whose coordinate system has the origin at the
bottom-left corner. The screen is 800 pixels wide and 600 pixels
high. A circular icon of radius 80 pixels is drawn with its centre at
point A (100, 150). Another circular icon of radius 100 pixels is
drawn with its centre at the point B (250, 230). Determine:
(i) whether any part of either circle lies outside the screen.
(ii) whether the two circles intersect each other.
