This system is difficult to work with because it has six different parameters, all of which affect the behavior of the system. However, each of them has a biological meaning. Write a brief explanation of what each parameter (r1, r2, d, j, w, h, k) means and specify the appropriate units for each one. (Assume that time is measured in years, so that for example, the units of N are "prey per year" and the units of P are "predators per year.")