The line ℓ is given by the equations x −2y + z = 2 and x + y −3z = 4. That is, ℓ consists of all points (x,y,z) that satisfy both equations. (a) Find a parametric formulation for ℓ. (b) Given a parametric representation of a line, how do we find two equations Who decides the line? Explain how you would proceed.

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