$$\(18 A=w-\frac{x^{2}}{y}\)$$ $$\(w=3.45\)$$ correct to 2 decimal places. $$\(x=1.9\)$$ correct to 1 decimal place. $$\(y=5 \quad\)$$ correct to the nearest whole number. Work out the lower bound of the value of $$\(A\)$$ Show your working clearly.

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