Evaluate ∬R(x2+y2)dA\iint_R (x^2 + y^2) dA∬R(x2+y2)dA where RRR is the region 1≤x2+y2≤41 \le x^2 + y^2 \le 41≤x2+y2≤4.
7.5π7.5\pi7.5π
15π15\pi15π
3.75π3.75\pi3.75π
30π30\pi30π