I am a new member of this forum...

I am stuck with a problem.Could anybody provide me the solution for this problem?

**Two clocks, seperated by 5 light hours, are synchronized according to an observer at rest relative to the clocks.How much are they out of synchronization according to a space ship observer who is in motion at v=0.8c from clock 1 to clock2.**

post any explanation that could prove useful..

thanks in advance...