One more explosion in air

1.  A projectile of mass M explodes while in flight into three fragments .One mass (m1= M/2) travels in the original direction of the projectile, mass m2(= M/6) travels in the opposite direction, a n d mass m3 (= M/3) comes to rest. The energy released in the explosion is equal to five times the projectile's kinetic energy at explosion. What are the velocities?