Find the equation for (a) the tangent plane and (b) the normal line at the point Po(4,0,4) on the surface 4z- x2 = 0. (a) Using a coefficient of 2 for x, the equation for the tangent plane is (b) Find the equations for the normal line. Let x= 4-8t. x=0. y=D z=0 (Type expressions using t as the variable.)

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