Chapter 1.3, Problem 20P

To determine

(a)

All equilibrium solutions.

To determine

(b)

The regions in the $xy$-plane where the solutions are increasing and decreasing.

To determine

(c)

The regions in the $xy$-plane where the solution curves are concave up and down.

To determine

(d)

To sketch:

The representative solution curves which are identified in part $\left(\text{c}\right)$.