Compute all parts of given problem:
Problem: A father racing his son has three-fifths the kinetic energy of the son, who has two-fifths the mass of the father. The father speeds up by 2.5 m/s and then has the same kinetic energy as the son.
Part A: What is the original speed of the father?
in m/s
Part B: What is the original speed of the son?
in m/s
Please show all work to find the original speed of the son.