Arrowheads

I wonder who made these arrowheads? I wonder if they killed their prey with these particular arrowheads? Who were these people what was their life like? What did they look like? Found these on my parents property many years ago. Oil on linen/archival board, 4"x5", unframed. $100.00 plus $5.50 postage. vernafuller@sbcglobal.net