A 1400-kg automobile starts from rest and travels 400 m during a performance test. The motion of the automobile is defined by the relation a = 3.6e-0.0005x, where a and x are expressed in m/s2 and meters, respectively. The magnitude of the aerodynamic drag is D = 0.35v2, where D and v are expressed in newtons and m/s, respectively.

Determine the power dissipated by the aerodynamic drag when
(a) x = 200m,
(b) x = 400m

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