(a) How can you handle the situation where scanlines pasaca through the vertex of a polygon and the edges at the vertex are on the manne side of the scanline in scanline polyfill algorithm? Explain with the help of suitable diagram. 181 (b) Given two triangles P with vertices Pl(100,100,55), P2(50,50,55), P3(150,50,55) and Q with vertices Q1(40,80,60), q2(70,70,55), Q3(10,75,70). Determine which triangle should be painted first waing the scen-line method. 17]