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6. a) Consider the plane with a scalar equation 4): - 2y + 2 ~ 19 = 0. Find the point of intersection of this plane with the line passing through the points AU, -6, -5) and B(3, -3, -3). [3 marks] b) Where does the line with the vector equation [x, y, z] = [6: 7' -8] + tl-2, 4: 1] intersect the xy-plane? [2 marks]