Normal shift!

A Equilateral wedge moving with a velocity V makes an elastic collision with the fixed sphere and returns along the same path; without any rotation. Neglect all friction and suppose that the sphere remains in contact with the wedge for a very short time Δt during which the sphere exerts a constant force on the wedge. Find the magnitude of the normal force exerted by the table on wedge during the time Δt ? Assumptions : Mass of wedge =2 kg. Velocity V=√3 m/s Time Δt=0.1 Take g=10 m/s^2