(1)(a) Find the reflection of the point A = (1, 2, 3) through the plane 2x + y + 3z = 41. (b) Find the reflection R(a, b, c) of an arbitrary point (a, b, c) in R3 through the plane 2x + y + 3z = 0. (c) Show that the map R : R3 → R3 which takes a point (a, b, c) to its reflection R(a, b, c) through the plane 2x + y + 3z = 0 is a linear transformation and determine its associated matrix.

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