A hot-air balloon has just lifted off and is rising at the constant rate of 2.1 m/s . Suddenly one of the passengers realizes she has left her camera on the ground. A friend picks it up and tosses it straight upward with an initial speed of 14 m/s. If the passenger is 2.5 m above her friend when the camera is tossed, how high is she when the camera reaches her? Express your answer using two significant figures