1.3.6. For each of the following, determine the equilibrium points. a. P+11.3P - .02P2 c. AP.2P(1 - P/20) e. P+1=cPdP. 11.3.9. (Calculus) Redo the preceding problem, but use derivatives to deter- mine the stability of the equilibria of Pt+1 = P₁ +r P,(1 − P₂). You PrP(1P). should, of course, get the same answers.