A 2-ft-thick block constructed of wood \((S G=0.6)\) is submerged in oil \((S G=0.8)\) and has a 2-ft-thick aluminum (specific weight \(=168 \mathrm{lb} / \mathrm{ft}^{3}\) ) plate attached to the bottom as indicated in Fig. P2.146. Determine completely the force required to hold the block in the position shown. Locate the force with respect to point \(A\).

Figure P2. 146

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6 ft Oil 4 ft 0.5 ft 3 -10 ft- Aluminum