Weights of $1-$year$-$old girls in the United States are normally distributed with mean $=9\mathrm{.}5kg$ and standard deviation $=1\mathrm{.}1kg.$

Use the Empirical Rule to answer the following questions. It may be helpful to draw and label a sketch.

$($a$)$ The middle $68\%$ of $1-$year$-$old girls weigh between os $kg$ and $kg.$

$($b$)$ About $16\%$ of $1-$year$-$old girls weigh less than than kg$.$

$($c$)$ What percent of $1-$year$-$old girls weigh between $7\mathrm{.}3kg$ and $11\mathrm{.}7kg?0^8\%$

$($d$)$ A $1-$year$-$old girl whose weight is at the ${84}^{th}$ percentile weighs kg$.$

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