Cosmological theory suggests that the average separation of galaxies, that is, the scale of the universe, is inversely proportional to the absolute temperature. If that is true, relative to the present size, how large was the universe compared to the scale today
(a) 2000 years ago,

(b) 10⁶ years ago, 

(c) t = 10 s after the Big Bang, 

(d) When t = 1 s, and

(e) When t = 10^-6 s?