The linearly elastic planar structure shown in the figure is acted upon by two vertical concentrated forces. The horizontal beams UV and WX are connected with the help of the vertical linear spring with spring constant k=20 kN/m. The fixed supports are provided at U and X. It is given that flexural rigidity EI=10⁵ kN-m², P=100 kN and a=5 m. Force Q is applied at the center of beam WX such that the force in the spring VW becomes zero. The magnitude of force Q (in kN) is (round off to the nearest integer)