Evaluate the double integral ∬R(x2+y2) dA\iint_R (x^2 + y^2)\,dA∬R(x2+y2)dA where RRR is the disk x2+y2≤1x^2 + y^2 \leq 1x2+y2≤1.
π2\frac{\pi}{2}2π
π\piπ
2π3\frac{2\pi}{3}32π
2π2\pi2π