What was the #1 song, album and artist of 1977?

What was the #1 song, album and artist of 1977?

Interesting to research this. I remember most of these songs. 1977 was an interesting year in that several different sounds were converging in different directions: rock, disco, punk was on the rise, etc. The Music of 1977. What was #1? Song? Album? Group? from Bob...