Evaluate ∫01∫01(x2+y2) dx dy\displaystyle\int_0^1 \int_0^1 (x^2 + y^2)\, dx\, dy∫01∫01(x2+y2)dxdy.
43\dfrac{4}{3}34
13\dfrac{1}{3}31
23\dfrac{2}{3}32
111