On comparing the ratios a1/a2,b1/b2 and c1/c2, find out whether the lines representing the following pairs of linear equations at a point, are parallel or coincident:(i) 5x - 4y + 8 = 0;7x + 6y - 9 = 0 (ii) 9x + 3y + 12 = 0;18x + 6y + 24 = 0(iii) 6x - 3y + 10 = 0;2x- y +9 =0