Reproduce the van der Pol oscillator model. Execute the simulation to compare your results with the results in the example (this is, of course, a necessary step to check your computer code). Next, set the damping coefficient b=0. Execute the simulation. The result should be simpleharmonic motion of amplitude unity because the initial condition in the second integrator was set equal to unity and period equal to 2π. Next, examine the case for b=1. Finally, examine b=5. Note the qualitative changes in the response function, i.e., in the plotted values of x.