Olivia and Jake walk into CVS looking for chips and candy. They see the electric shopping carts generally used by the elderly and disabled. The carts are set aside with no warnings posted and are apparently freely available to all who want to use them. They decide to take a spin around the store. While turning a corner the two carts accidentally collide causing Olivia to fall off and break her wrist. Olivia sues CVS. What are the elements of negligence? Identify and explain each.