Can anyone help ID some shark teeth found in Tybee Island GA and HHI?

Hi guys! Just got back from a trip to Tybee Island, Georgia & HHI and found these teeth! I know three of them are shark teeth but not sure what this fourth one is!

The tiniest tooth on the far right was found at Fish Haul Beach on Hilton Head Island, the other three were at North Beach and Middle Beach on Tybee Island.

Any idea what kinds of shark these teeth belong to? and who that larger one is from! Looks quite old.

thanks in advance :)