Compare the diseases modeled by each of the following differential equations with the flu model in this section. Match each set of differential equations with one of the following statements. Write a system of differential equations corresponding to each of the unmatched statements.

(a) More infectious; infecteds removed more slowly.(b) More infectious; infecteds removed more quickly.(c) Less infectious; infecteds removed more slowly.(d) Less infectious; infecteds removed more quickly.(e) Infecteds never removed.

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(1) (III) ds dt dI dt dS dt dI dt = -0.04.SI = 0.04.SI -0.21 = -0.03.SI = 0.03SI dS (II) = -0.002SI dt dI dt = 0.002.SI - 0.31