<image>In the image , there is a bidirectional highway tunnel with a cross-section formed by a parabola and three sides of rectangle ABCO. The maximum height of the tunnel is 4.9m, AB=10m, BC=2.4m. Now, placing the cross-section of the tunnel in a Cartesian coordinate plane, assume there is a vehicle with a height of 4m and a width of 2m carrying a container that wants to pass through the tunnel. The question is: disregarding other factors, how many meters must the right side of the vehicle be from the tunnel's right wall (where AO and BC represent the walls) in order to avoid touching the top of the tunnel (the parabolic part represents the top of the tunnel)?