The identical twins Speedo and Goslo join a migration from theEarth to Planet X. It is 20.0 light-years away in a reference framein which both planets are at rest. The twins, of the same age,depart at the same time on different spacecraft. Speedo's crafttravels steadily at 0.900c, Goslo's at 0.740c. Calculate the age difference between the twins after Goslo'sspacecraft lands on Planet X.