4. (a) Write W₁ = (1,0), W₂ = (0, 1), and w3 = (11,6) as linear combinations of V₁ = (5, 4) and v₂ = (2, 3). (b) Let V₁ = (-2,1,5), V2 Could it be all of R³? = (0, 1, 4), V3 = (-2,4, 17). What is span(V₁, V2, V3)?

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