Some of them are one-sided, and some of them are regular limits or two-sided limits. All right, let's start with this first one. The limit as x approaches four from values larger than equaling four. So that's what that plus tells us. And so when x is greater than four, our f of x is equal to square root of x. So as we are approaching four from the right, we are really thinking about this part of the function. And so this is going to be equal to the square root of four.