A player bounces a 0.50-{rm kg} soccer ball off her head, changing the velocity of the ball from initial velocity = (8.3 m/s){{hat x}} + ( -2.6 m/s){{hat y}}
to final velocity= (5.4 m/s){{hat x}} + (3.6 m/s){{hat y}}.
If the ball is in contact with the player's head for 6.7 {rm ms}, what is the direction of the impulse delivered to the ball?