$$\(16 P=\frac{2 a-c}{d}\)$$ $$\(a=58.4\)$$ correct to 3 significant figures. $$\(c=20\)$$ correct to 2 significant figures. $$\(d=3.6\)$$ correct to 2 significant figures. Work out the upper bound for the value of $$\(P\)$$. Show your working clearly. Give your answer correct to 2 decimal places.

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