Two lines L_{1}: 2y - 3x - 6 = 0 and L_{2}: 3y+x-20 = 0 intersect at point A.

- Find the coordinates of A.
- A third line L
_{3} is perpendicular to L_{2} at point A. Find the equation of L_{3} in the form y = mx +c, where m and c are constants. - Another L
_{4} is parallel to L_{1} and passes through (-1, 3). Find the x and y intercepts of L_{4}