Let F=Vf, where f(x.y.z)=x3y²z+z³, and let S be the surface boundary of the solid E={(x.y,z)ER³ : x?+y²+z?s1,x20, y20, z 20}. Let I= •n do. Let h(x.y)= -2x³+9x²-12x - y². Choose the TWO correct statements. (1,0) and (-1,0) are local extrema of h(x,y) h(x,y) has no local minima. (1,0) and (0,0) are local extrema of h(x,y) of h(x,y) has a saddle point at (0,0) h(x,y) has a local minimum at (2,0). 12

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