A galaxy is receding from an observer such that the hydrogen alpha line appears to be at 657 nanometers instead of 656.3 nanometers. Which of the following best describes the changes in the beta and gamma lines for this galaxy?

W) They will both be shifted longer by 0.7 nanometers

X) They will both be shifted by slightly less than 0.7 nanometers

Y) They will both be shifted by slightly more than 0.7 nanometers

Z) They will both be shifted shorter by 0.7 nanometers
X) THEY WILL BOTH BE SHIFTED BY SLIGHTLY LESS THAN 0.7