2. R 86. Let R be the region in the first quadrant bounded by the graphs of y = 4 cos π.χ and y = (x-2)², as shown in the figure above. The region R is the base of a solid. For the solid, each cross section perpendicular to the x-axis is an isosceles right triangle with a leg in region R. What is the volume of the solid? (A) 1.775 (B) 3.549 (C) 4.800 (D) 5.575