So this, the limit as we approach four from below, this one-sided limit from the left, we could say, this is going to be equal to negative five. And if we were to ask ourselves the limit of f of x as x approaches four from the right, from values larger than four, x approaches four from the right, well, same exercise. f of five gets us here. f of 4.5 seems right around here. f of 4.1 seems right about here. f of 4.01 seems right around here. And even f of four is actually defined, but we're getting closer and closer to it.