The observed baseline vector components in meters between two control stations are (3814.244, 470.348, 1593.650). The geocentric

Question:

The observed baseline vector components in meters between two control stations are (3814.244, −470.348, −1593.650). The geocentric coordinates of the control stations are (1,162,247.650, −4,655,656.054, 4,188,020.271) and (1,158,433.403, −4,655,185.709, 4,189,613.926). What are?
(a) ∆X ppm?
(b) ∆Y ppm?
(c) ∆Z ppm?