In class, we started with the classic river crossing problem of a wolf, a goat, and a cabbage. We then moved on to a variation in which we need to carry humans and zombies instead. Remember, if there are more zombies than humans on any side of the river, all of the humans on that side will die. How would you solve the case with 4 humans and 4 zombies, along with a boat with two slots? Is it impossible? If so, what is your reasoning?