And I encourage you to, and I encourage you to, to finish this up. Once, actually just write it in terms of the function, use function notation. You don't have to write it out as one plus point oh one times something squared. So I'm assuming you've had a go at it. So for each of these, so for the first, so for the first rectangle over here, we're going to multiply two times the height. So the height right over here is one, and this is the first rectangle, so you might be tempted to say times f of n. But then that breaks down as we go into the second rectangle. The second rectangle, the two still applies.