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$13\mathrm{.}4($a$)$ The following drawing is the foundation plan of the weekend house of Question $13\mathrm{.}1.$ The plan shows $8-$in$.$ thick reinforced concrete masonry $($CMU$)$ foundation walls, which support sawn lumber framing for the first floor over an accessible crawl space, as shown in Section AA in Question $13\mathrm{.}1.$ Using the information provided in Section $15\mathrm{.}6$ in the text, draw the first floor framing plan superimposed on the foundation plan. Indicate floor joists and rim joists by single lines. Also, show any strengthening of floor framing necessary to support the stair carriages $($see page $869$ in the text$),$ and to support the non$-$load$-$bearing walls around the toilet. Assume joist spacing as $16$ in$.$ o$.$c$.$ and provide labels as needed.