For the function f(x,y)=x3e2yf(x, y) = x^3 e^{2y}f(x,y)=x3e2y, calculate the second-order partial derivative fxxf_{xx}fxx.
6xe2y6x e^{2y}6xe2y
3x2e2y3x^2 e^{2y}3x2e2y
12xe2y12x e^{2y}12xe2y
6x2e2y6x^2 e^{2y}6x2e2y