A space traveler takes off from Earth and moves at speed 0.9900c toward the star Vega, which is 26.00ly distant. How much time will have elapsed by Earth clocks?

(a) When the traveler reaches Vega and

(b) When Earth observers receive word from the traveler that she has arrived?

(c) How much older will Earth observers calculate the traveler to be (measured from her frame) when she reaches Vega than she was when she started the trip?