Javier downloads an illustration from an online image library and modifies it for his purposes. The illustration he downloads is licensed under the Creative Commons Attribution-ShareAlike (CC BY-SA) license. What three things does he need to do to comply with the terms of the license? charge a fee for use of his image
permit others to make derivatives of his image
acknowledge the source of his image
restrict the use of his image to noncommercial purposes
license his image under identical terms as the illustration he uses