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Required information

Consider the given figure. For all bars, area $=2\mathrm{.}5i{n}^2$ and $E=9000$kip$\frac{s}{i}{n}^2.$

NOTE: This is a multi$-$part question. Once an answer is submitted, you will be unable to return to this part.

Compute the vertical deflection of joint $D$ produced by the $30-$kip load.

The magnitude of the vertical component of displacement for joint $D$ is $\frac{?}{\text{b}\text{a}\text{r}}()DY=$

in$.$