I need help solving the following problems and if you could explain in detail and show work how you did it that would be appreciated

Name: Date: AP Physics 1 Period: Katie Bell and Melisandre are having a race that is "D" meters long. They start the race at the same time at the same position, and both girls maintain constant accelerations for the whole race. Katie's acceleration is half as much as Melisandre's acceleration. Melisandre finishes the race in time "tM". 1.) How long does it take Katie to finish the race, in terms of tM? 2.) Melisandre's speed when she finishes the race is "VM." What is Katie's speed when she finishes the race, in terms of UM