IB - hmmm. I'll pass over 1985.

One of the alternative Youtubes of your 1978 is titled "THE BEST BASSLINE EVER". I'd go along with that, although this is close.

1973 - yeah, I guess, although I was sold in 1972. And I'll see your 1975 and raise you 1990. (Unfortunately they've cut off the octave jump on the last chorus, which is one of the best bits.)

Now I really must get back to work...