Unknown radius

Given: Problem $13\mathrm{.}13($Kavanagh and Mastin, $9$th ed$).$

Find: The unknown radius, arc length, and tangent length.

Hint: Use Civil $3$D and include a plot of your solution.

$13\mathrm{.}13$ Two street curb lines intersect with $=71{36}^{\text{'}},$ See Figure $13-51.$ A curb radius must be selected so that an existing catch basin $(8)$ abuts the future curb. The curb$-$side of the CB $q$ is located from point $V$:$V$ to $CB=8\mathrm{.}713m$ and angle $E-V-CB=21{41}^{\text{'}},$ Compute the radius