Barn finds... Help identifying them?

[MAXXTRAX77]

Hello just had these bikes handed to me. Can I get some help figuring out what I have?

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[B607]

I like that first frame. Some guy didn't like riding a girlie bike so he added a bar. A man after my own heart. Gary

 

[whitefiretiger]

The yellow john deer looks to be a Murray built bike.
Sorry that's all I've got.

A hint for you is show us the chain rings and guards as they can help with id if they are in fact original parts.

 

[Rustinkerer]

The first bike is a Monark, the two convertibles are AMF, and Manton & Smith made their own frames for a while. =Adam