Change from rectangular to cylindrical coordinates.

$($a$)$

$(0,3,8)$

$($r$,,$ z$)=$

Incorrect: Your answer is incorrect.

$($b$)$Change from rectangular to cylindrical coordinates.

$($a$)(0,-3,8)$

$(r,,z)=$

$($b$)(-5,5\sqrt[\phantom{2}]{3},3)$

$(r,,z)=$