Plot each of the following points given in polar coordinates. Then state the other three equivalent polar forms of the coordinates.

1. $(−1, \frac { \pi } { 2 })$ 

   Hint (a):

   From the origin, move $1$ unit left, then rotate $π/2$ radians counterclockwise.

2. $(−5, \frac { 2 \pi } { 3 })$ 

   Hint (b):

   From the origin, move $5$ units left, then rotate $2π/3$ radians clockwise.

3. $(2, -\frac { 5 \pi } { 4 })$ 

   Hint (c):

   From the origin, move $2$ units right, then rotate $5π/4$ radians clockwise.