Determine the value of c so that the plane with equation 2x + 3y + cz – 8 = 0 is parallel to 6. (а) the line with symmetric equation "1 = 2 = z +1. (b) Hence determine the distance from the point (1, 2, –1) to this plane. (c) Find the angle the plane makes with another plane whose equation is 3x – 2y = 0.

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