he Cartesian coordinates of a point are given.

$($a$)$

$(3$sqrt$3,3)$

$($i$)$

Find polar coordinates $($r$,)$ of the point, where

r $>0$ and $0<2.$

$($r$,)=$

$($ii$)$

Find polar coordinates $($r$,)$ of the point, where

r $<0$ and $0<2.$

$($r$,)=$

$($b$)$

$(2,5)$

$($i$)$

Find polar coordinates $($r$,)$ of the point, where

r $>0$ and $0<2.$

$($r$,)=$

$($ii$)$

Find polar coordinates $($r$,)$ of the point, where

r $<0$ and $0<2.$

$($r$,)=$