I will say that I like the composition of the last one the movement between "verse" and "hook" sections is good. The others are well made and could easily be something Id hear on the radio or see on Youtube I think if you could contact the right rappers youd probably make some money if I could give you any advice on getting your beats to right people I would but unfortunately I cant so put the work in dude and hunt down managers and rappers online Im sure you'll get picked up by someone.
keep it up
peace