A helium-filled balloon is attached to the floor of a motionless car using a massless string, shown schematically in the figure below (car windows are closed). Then, the car starts motion with a constant known acceleration along the y-axis: = . As a result, the balloon deflects from the vertical axis and reaches a new steady position. Determine the angle and direction of the balloon's deflection from the vertical axis. Please draw a sketch indicating all forces applied to the balloon and write the balance of forces