Radius is equal to three. The entire circle is pi r squared. So the entire circle, the area if this was an entire circle right over here, if this was an entire circle, that area would be pi r squared, so pi times three squared, so nine pi. So it would be nine pi, but this is only 1 1⁄4 of the entire circle, so we wanna divide it by four. So this right over here, we'll evaluate to nine pi over four. So part A, we get, it's equal to negative six, that's that right over there, minus nine pi, minus nine pi over four. And that's at least the first part of part A.