Another Example Consider a situation in which we are studying 50 microorganisms initially in the Petri dish. We lose 50% of the population each hour due to \"forces of death,\" but through a one way hatch microorganisms can enter the Petri dish. In the rst hour no microorganisms enter, but in the second hour 10 per hour do, 20 microorganisms per hour can enter our Petri dish in the third hour, 30 microorganisms per hour can enter our Petri dish in the fourth hour, 40 in the fth hour, etc. Model this situation. State all your assumptions used in the model building process. Build your model very carefully and be sure to dene your variables and units. Exercise 1.5: Build a code to simulate the model you made up. Next change some of the parameters in the problem, and compare the results. For example, what happens if 60% of the population is lost every hour, but 0, 15, 30, 55, 60, etc. organisms per hour enter in the next hours. Note that several vectors can be plotted at the same time by using the command plot: plot(t,p, '*' ,t,q, '+' ,t,s, '0') The legend command is useful to indicate which curve is which. >> 1egend( 'scenariol ' , 'scenarioZ' , 'scenarioS')