Question 3 ( 8 points) Infectious diseases, such as influenza, can spread according to the autonomoux differential equation 2a=I(NhI I denotes the number of infected people. N denotes the total wize of the population beng modeled, is a rate of transmision constant, and iv is the recovery rate from infection. stable, Also, draw direction arrows for the cate where the number of infected pepple is I=500 and for the case whore I=900 You may find it heipful to use Descnos or Wolfram Alpha to plot the graph of f(t) versus t, or you can plot it by riand if you like