A balloon is rising vertically above a level, straight road at a constant rate of 0.35 [m/s]. Just when the balloon is 25 m above the ground, a bicycle moving at a constant rate of 6 [m/s] passes under it (see figure) a) How fast is the distance s(t) between the bicycle and balloon increasing 3 [s] later? b) What is the altitude of the balloon? (same time in a) of 3[s] later)

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