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AAlways minimum BAlways maximum CEither minimum or maximum DInfinite

Aij ij i j c X 1 = ∑∑ Bij i c 1 = ∑ Cij i j c 0 = ∑∑ Dij ij i j c X 0 = ∑∑

Ax1 = 2, x2 = 1, x3 = 0 Bx1 = 5, x2 = 0, x3 = -1 Cx1 = 0, x2 = 5/3, x3 = 2/3 Dx1 = 0, x2 = 2, x3 = 1