C2M.6 A helium atom with mass , initially moving at a speed of | | in a certain direction collides with an oxygen atom of mass 4m at rest. After the collision, the helium atom is observed to move at a right angle with its initial motion at a speed of v. 8. . Assume this process hap- pens so rapidly that gravity does not have enough time to change either atom's momentum significantly. (a) Draw initial and final momentum arrows for the first atom and infer from your drawing the magnitude and qualitative direction of the impulse delivered to each atom (express the magnitude as a multiple of me .D). (b) Infer from your drawing the magnitude and qualita tive direction of the oxygen atom's final velocity [express it's magnitude in terms of do)