Let F(x, Y, Z) = 10x I + 10y J $\sigma$

Let F(x, y, z) = 10x i + 10y j + 10z k and $\sigma$ be the portion of the surface z = 5 - x² - y² that lies above the xy-plane. Find the magnitude of the flux of the vector field across $\sigma$ .

A)
B)
C)
D) 0
E)