At a wild-west show, a markmanfires a bullet at a 12 g coin that's thrown straight up into the air. The marks man points his rifle at a 45o angle above the ground, then fires a 15 g bullet at a speed of 550 m/s. Just as the coin reaches its highest point, the bullet hits it and glances off, giving the coin an exactly vertical velocity of 120 m/s. At what angle measured with respect to the horizontal does the bullet richochetaway from this collision?