A ball of mass m is suspended by a massless string of length l=10 m from a fixed point as shown in the figure below. A ball of mass 2m strikes at an angle θ=45∘ from the horizontal and sticks to it. If the system deflects by angle ϕ=π2, then the velocity of the system just after the collision and the velocity of 2m particle before collision are, respectively (in m/s)