Two constant forces F→1 and F→2 act on a body of mass 8 kg. These forces displace the body from point P (1, -2, 3) to Q (2, 3, 7) in 2s starting from rest. Force F→1 is of magnitude 9 N and is acting along vector (2i^−2j^+k^). Work done by the force F→2 is