Exercise Consider the following model, with a constant recruitment rate A. This means that a certain fixed number of individuals arrive into the susceptible class per unit time. dS A - BS Bs- us dt dI BS- N dt dR I- µR dt with N(t) = S(t) + I(t) + R(t). (a) Determine the population steady state N*. (b) Show that N(t) → A/u as t → 0o. (c) Find all equilibrium points

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