4 The equation of a curve in polar coordinates is \(r = \frac { 1 } { 2 } - \cos \theta\).
- Sketch the polar graph of the curve.
- Find the exact area enclosed by the curve between \(\theta = \frac { 1 } { 3 } \pi\) and \(\theta = \frac { 5 } { 3 } \pi\).