A function F(x, y) is a composite function such that F(x, y) = h(u(x, y), v(x, y)) where h = h(u, v), u=u(x,y), v=v(x,y) are functions of two variables. Calculate the value of partial derivative Fy (x, y) at the point (x, y) = (-8, –7) given that u (-8, – 7) = –6, v (-8, – 7) = –9 and that %3D %3D

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