Calculating the maximum stress in a finite element model, we used a \(3 \times 2,6 \times 4,12 \times 8\), and \(24 \times 16\) elements. The results are given in the table. Estimate the exact maximum stress. For convenience, you can assume that the largest element size \(h_{1}\) is 1 .

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Mesh size Max. stress (MPa) 32 71.53 6x4 75.63 12 x 8 77.35 24 x 16 77.92