Plot the points with the following polar coordinates:

(a) $\left( 3,\dfrac{5\pi }{3}\right)$

(b) $\left( 2,-\dfrac{\pi }{4}\right)$

(c) $( 3,0)$

(d) $\left( -2,\,\dfrac{\pi }{4}\right)$

Solution Figure 29 shows the points.

Figure 29