Unknown 4 Beautiful 70s Disco

[mucrim]

Hello friends.
How difficult it is to solve these disco musics.
They were all cut from films in 70s.
I would be very glad if you help with their identities.

https://vocaroo.com/i/s098SaRMvv6h
https://vocaroo.com/i/s103kBWOrrre
https://vocaroo.com/i/s1IkhpxgsUF0
https://vocaroo.com/i/s0Bzb0fBO6b9

Thanks