A certain star is 10.5 light-years away. How long would it take a spacecraft traveling 0.950c to reach that star from Earth, as measured by observers in the following locations?

(a) on Earth

years

(b) on the spacecraft

years

(c) What is the distance traveled according to observers on the spacecraft?

ly

(d) What will the spacecraft occupants compute their speed to be from the results of (b) and (c)?

c