A boat sails from the pier at Fisherman's Wharf in San Francisco at 3.40 m/s, directly toward Alcatraz. A kite rider heads directly away from Alcatraz toward the boat at a relative speed of 6.40 m/s, according to the skipper of the sailboat. 1) Calculate the velocity of the kite rider relative to the pier. Use a coordinate system where positive x direction is along the motion toward the island. (Express your answer to three significant figures.)

A boat sails from the pier at Fisherman's Wharf in San Francisco at 3.40 m/s, directly toward Alcatraz. A kite rider heads directly away from Alcatraz toward the boat at a relative speed of 6.40 m/s, according to the skipper of the sailboat. 1) Calculate the velocity of the kite rider relative to the pier. Use a coordinate system where positive x direction is along the motion toward the island. (Express your answer to three significant figures.)