Find the points of intersection of the graphs of the equations.\
r = 1 + \cos \theta\
r = 1 - \sin \theta\
r \ge 0, 0 \le \theta < 2\pi\
(r, \theta) = \left(\frac{3\pi}{4}, \frac{7\pi}{4}\right) \quad \text{(smallest } r \text{-value)}\
(r, \theta) = \left(\frac{-2 - 1}{2}, \frac{3\pi}{4}\right)\
(r, \theta) = \left(\frac{-2 + 1}{2}, \frac{7\pi}{4}\right) \quad \text{(largest } r \text{-value)}
