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SCALCET$815\mathrm{.}8\mathrm{.}001.$

Plot the point whose spherical coordinates are given. Then find the rectangular coordinates of the point.

$($a$)(5,\frac{}{3},\frac{}{6})$

$(x,y,z)=(x)$

$($b$),(9,\frac{}{2},3\frac{}{4})$