(b) Use the Liang Barsky algorithm to clip the lines AB, CD and EF. The coordinates of the viewing window is defined as Xmin = 1, Xmax = 9 and Ymin=2, Y max=8. The coordinates of the end point of lines are A (3,7), B(3,10), C(6,6), D(8,9), E(-1,7) and F(11,1)