(a) Find the equation of the plane which contains the three points (1,2,5), (2, -1, 3) (3, 1, 7).  (b) Determine the distance between the point (1,-2,5) and the plane in part (a)

For the curve expressed in parametric equations

Find the point on the curve at which the curvature is a maximum and find the limit of the curvature as

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