Answer
$\overline{z}=7-i$ and $|z|=\sqrt{50}$.
Work Step by Step
Of a complex number $z=a+bi$, $\overline{z}=a-bi$ and $|z|=\sqrt{a^2+b^2}$
Hence here, $\overline{z}=7-i$ and $|z|=\sqrt{7^2+1^2}=\sqrt{50}$.
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