9.3) Exercise 1: Prey
As a first step, we will simulate the behaviour of the prey population in the absence of predators. Design and implement a model for the following system:
50 Deer are introduced on an island with unlimited grassland.
On average, 0.2 deer are born and survive for each deer in the population. Deer never die of natural causes.
Use a step size of 1 year and run over 20 years.
