For the simulations include a printout of your results and a thoughtful discussion of your findings. If you used code on the course website or on the book's website, say which code you used. If you used an applet, say what applet. If you wrote your own code, include it and mention what you used as a model.
Be sure to show your steps and explain your reasoning. You will receive very little if any credit for just writing down a number. So, for example, in section 1.2 #13, if you just write 11:4 you will receive no credit.