Convert the van der Pol equation to a system. Graph the limit cycle and some approaching trajectories for = 0.2, 0.4, 06, 0.8, 1.0,

Convert the van der Pol equation to a system. Graph the limit cycle and some approaching trajectories for μ = 0.2, 0.4, 06, 0.8, 1.0, 1.5, 2.0. Try to observe how the limit cycle changes its form continuously if you vary μ continuously. Describe in words how the limit cycle is deformed with growing μ.