1. Find the equations of the line through (3, 1,-2) which is perpendicular and intersects x+1 1 the line = yta= 211 1 1 2. A triangle has vertices at A (2,1,6), B(-3, 2, 4), and c (5,8,7). Perpendiculars are drawn from these vertices to the xz plane. Locate the points A', B', and C' which are the intersections of the perpendiculars through A, B, C and the Xz plane. Find the equations of the sides of the triangle A'B'C'. 3. Find the equation of the plane which passes through the given point Po and has the given attitude numbers Po (1,4,2); 3,1-4 4. Find the equation of the plane which passes through the three points. (1,-2,1), (2,0,3), (0,1,-1)