求指导本题解题过程，谢谢您！4.∑是 =sqrt ({x)^2+(y)^2}((x)^2+(y)^2leqslant 1) 下侧,则-|||-iint y(z)^2dydz+((x)^2y-(z)^3)dzdx+(y)^2zdxdy-|||-=( ) ()-|||-A dfrac (3pi )(20)-|||-B dfrac (pi )(4)-|||-C -dfrac (3pi )(20)-|||-D dfrac (pi )(10)

求指导本题解题过程，谢谢您！