Determine whether the following statements are true and give an explanation or counterexample.

a. The point with Cartesian coordinates (-2, 2) has polar coordinates (2√2, 3π/4), (2√2, 11π/4), (2√2, -5π/4), and (-2√2, -π/4).

b. The graphs of r cos θ = 4 and r sin θ = -2 intersect exactly once.

c. The graphs of r = 2 and θ = π/4 intersect exactly once.

d. The point (3, π/2) lies on the graph of r = 3 cos 2θ.

e. The graphs of r = 2 sec θ and r = 3 csc θ are lines.