$($a$)$ The Cartesian coordinates of a point are $(7,7).$

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

$=$

$$

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

$$

$r=$

$$

$=$

$($b$)$ The Cartesian $$oordinates of a point are $(1\sqrt[\phantom{2}]{3},-1).$

$($i$)$ 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

$r=$

$=$