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A line L1 passes through the points (-2, 3) and (-1, 6) and is perpendicular to L2 at (-1, 6).
a) Find the equation of L1.
b) Find the equation of L2 in the form ax + by
- c = 0 where a, b and c are constants.
c) Given that another line L3 is parallel to L1 and passes through point (1, 2), find the x and y intercepts of L3.
d) Find the point of intersection of L2 and L3.