A ball of masses m1=0.22kg that is moving with a speed of 5.5m/s( positive x direction) collided head on and elastically with another ball of unknown mass m2 initially at rest. Afterward the incoming ball m1 bounces backwards with a speed of 3.5m/s. A) calculate the velocity of the target ball m2 after the collision B) calculate the mass m2 of the target ball C if the collision lasts 0.1seconds what is the magnitude of the average force during the collision?