The shaft is supported by a smooth thrust bearing at \(A\) and a smooth journal bearing at \(B\). If \(P=5 \mathrm{kN}\) and the shaft is made from steel having an allowable normal stress of \(\sigma_{\text {allow }}=150\) \(\mathrm{MPa}\) and an allowable shear stress of \(\tau_{\text {allow }}=85 \mathrm{MPa}\), determine the required minimum wall thickness \(t\) of the shaft to the nearest millimeter to safely support the load.

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-1 m- B -0.5 m -40 mm