Help! I need the code for this!

Re-write your code using the functions outlined below. Using these cleaned-up functions re-create the graphs from Problem 3 but with lines instead of plotting markers. You can change the actual function/variable names if you want, but you need to use these parameters. The first function, DiseaseStep, takes one time step. The second function, DiseaseSimulate, calls DiseaseStep nSteps times to simulate the epidemic over time. It also creates the time array (see implementation note in previous week). Splitting it up this way lets you use DiseaseStep elsewhere if need be. Having DiseaseSimulate return arrays is handy for plotting. DiseaseSimulate should call DiseaseStep. Note that you can calculate the starting N value using SStart and IStart (RStart is zero). Your script should call DiseaseSimulate once with each starting value for S (use a for loop). Todo: 1. Replace one step of the calculation with a function. Make sure it works.

functi on [ SOut, I Out, ROut ] = Di seaseSt ep( SI n, IIn, RI n, N, a, b, h )

2. Replace the simulation for loop with a function. Make sure it works.

functi on [ SvsTi me, IvsTi me, RvsTi me, ti me ] = Di seaseSi mul at e( SSt art, I St art, a, b, h, nSt eps )

3. Copy your script from problem 3 and re-write it with your DiseaseSimulate function Implementation note: Youre essentially moving the calculation part of your for loop from problem 3 into DiseaseSimulate (and splitting out the actual update step into DiseaseStep). Your for loop for this week should loop over the different starting values, getting the arrays from DiseaseSimulate and then plotting them. Use a second for loop to add the title, axes, labels, and legend to the graph. To make this work, youll need to make an array of strings (you can just copy this bit of code): titl eName = {' Suscepti bl es', 'Inf ect ed', ' Recovered', ' Tot al'}; for k = 1: 4 (l abel s, axes, l egend f or t he subpl ot) titl e(strcat(str Name{k}, ' versus ti me') ); end