And how high is it? Well, the height here is f of four, which is eight. So this is going to be 24 square units, whatever the units happen to be. This is going to be three times, the height here is three, f of seven is three. So that is nine square units. And then here, this is three, the width is three times the height, f of 10 is five. So three times five, which gets us 15.