I need help with these two problems please and please make it legible

Find the derivative of the function at P0 in the direction of A. f(x,y,z) = 2 e " cos (yz), Po(0,0,0), A = i + 5] +4k (DAG (0,0,0) = E (Type an exact answer, using radicals as needed.) Find an equation for the plane that is tangent to the surface z = In (x + y) at the point P(1,0,0). Using a coefficient of 1 for z, the equation of the plane is = 0