3.50 Consider the following alteration of Example 3.39 9.ry (1 - 2) 10.3+1 20y y 102 +1 (i) Find the nullclines and a positively invariant rectangle. (ii) Compute the equilibrium in the first quadrant and show that it is asymptotically stable for all b>0. by(1- 3.50 Consider the following alteration of Example 3.39 9.ry (1 - 2) 10.3+1 20y y 102 +1 (i) Find the nullclines and a positively invariant rectangle. (ii) Compute the equilibrium in the first quadrant and show that it is asymptotically stable for all b>0. by(1