The Cartesian coordinates of a point are given.

$($a$)(-4,4)$

$($i$)$ Find polar coordinates $(r,6)$ of the point, where $r>0$ and

$(r,0)=()$

$($ii$)$ Find polar coordinates $(r,)$ of the point, where $r<mn>0</mn>$ and

$(r,)=()$

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

$(1)$ Find polar coordinates $(r,)$ of the point, where $r>0$ and

$(r,)=()$

$($ii$)$ Find polar coordinates $(r,)$ of the point, where $r<mn>0</mn>$ and

$(r,)=()$