Each side of a regular octagon has a length of $$\(18 \mathrm{~mm}\)$$, correct to the nearest $$\(0.5 \mathrm{~mm}\)$$ Diagram NOT accurately drawn (a) Write down the lower bound of the length of each side of the octagon. $$\(\mathrm{mm}\)$$ (1) (b) Write down the upper bound of the length of each side of the octagon. $$\(\mathrm{mm}\)$$ (1)

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