Find a basis for the orthogonal complement of the subspace of R4 spanned by the following vectors. V₁ = (1,-1,7,3), v₂ = (2,-1,5,2), v3 = (1, 0, -2, -1) The required basis can be written in the form {(x, y, 1, 0), (z, w, 0, 1)}.

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