Please help to solve this task and explain the solution:

Unless specified otherwise, assume g = 9.81 m/s-. Problem 1 (25 pts) - Energy A father running after his daughter has half the kinetic energy of the daughter, who has half the mass of the father. The father speeds up by 1 m/s and then has the same kinetic energy as the daughter. What are the original speeds of (a) the father and (b) the daughter