The height h (um) of a particle relative to a fixed reference point depends on the position of the x and y directions as follows h(x, y) = 4x² - xy + 4y² while the position of x and y depends on the travel time of particle t based on the following equation x(t) = 1² + e-5+t y(t) = t + in(6-t) determine the speed at which the particle is Use the chain rule to moving up at t = 5

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