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A thin wire of length \( I \) and uniform linear mass density \( \rho \) is bent in the form of a
\( \mathrm{P} \) square. Its moment of inertia about an axis along one of its edge is
(1) \( \frac{2 \rho}{3}\left(\frac{I}{4}\right)^{3} \)
(2) \( \frac{3 \rho}{2}\left(\frac{I}{4}\right)^{3} \)
(3) \( \frac{5 \rho}{3}\left(\frac{I}{4}\right)^{3} \)
(4) \( \frac{1 \rho}{3}\left(\frac{I}{4}\right)^{3} \)
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