Indian Artifact Experts Needed

[Brathany]

Found these stone objects. Human influence evident. I identify a hide scraper, something knapped, middle/bottom of arrowhead, but the pink one baffles me. I figure it's a broken off piece of some tool design…

 

[Fish4Food]

Left to right I'd say:
Broken knife blade
Scraper
Clueless
Flake

But I'm as far from a rock expert as you could be.