Which of the following statements is correct regarding the four forces acting on an aircraft during in straight-and- level, non-accelerated flight (choose ALL that apply)? O the four forces are balanced lift equally opposes weight the aircraft's velocity could be changing O) the motion of the aircraft is correctly described by Newton's First Law of Motion drag equally opposes lift the net force is opposite to direction of aircraft motion the aircraft's speed is changing at a constant rate O) the sum of all four forces is in the direction of the aircraft motion