And then it looks like the slope starts to decrease as we approach y is equal to four. And so if I had a solution that went through this point, my guess is that it would look something, and then now the slope decreases again as we approach y is equal to zero. And of course, we see that because if when y equals zero, this whole thing is zero, so our derivative's going to be zero. So a reasonable solution might look something like this. So this gives us a clue. Well, look, if a solution goes through this point, this right over here might, might be what it looks like. But what if it goes through, I don't know, what if it goes through this point right over here?