Problem 2: Create a systems dynamic model in VENSIM that assumes that the rate of change of ash near a volcano with respect to time is 4mm/day and the initial quantity is 3mm thick. Write the problem statement, givens, and assumptions of your model. Include the Vensim layout (screenshot) with a Figure Caption below describing the model, include the document files (cleaned up to remove blank lines).

a. Run the simulation using a step size of 0.5 days for 10 days and produce a graphical output, give the amount after t=1day (use the table from VENSIM) for both screenshot the outputs.

b. Repeat "a" above using a step size of 0.25days, and show output from the second simulation in a table, is it the same amount discuss why or why not?