Refer to the predator-prey and the modified predator-prey systems discussed in the text...

Refer to the predator-prey and the modified predator-prey systems discussed in the text (repeated here for convenience):

Suppose predators migrate to an area if there are five times as many prey as predators in that area (that is, if R > 5F), and they move away if there are fewer than five times as many prey as predators. How would you modify these systems to take this into account?