A stunt pilot is attempting to drop a water balloon from a moving airplane onto a target on the ground. The plane moves at a speed of 82.8 m/s and a 49° above the horizontal when the balloon is released. At the point of release, the plane is at an altitude of 700 m. At the point just before balloon strikes the ground, what angle does its velocity make with the horizontal? Give your answer as an angle measured below the horizontal.
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