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Explanation:

This question can be done by assuming some values for x, y and z, e.g. let x = 4, y = 3 and z = 1. Thus, la(4, 3, 1) = min(7, 4) = 4; le(x, y, z) = max(1, 2) = 2; ma(x, y, z) = $\frac{1}{2}$ (4 + 2) = 3. Hence, we can see that the only answer-choice that satisfies the relationship is ma(x, y, z) < la(x, y, x).