It's about the tort law. Could you answer these questions and explain why or how in detail? Thank you very much.

One day a few weeks ago, Mrs. Wu decided to go shopping for food. She went into a local grocery store, located in the Business Center in Chashan. She entered the store, heading through the section where the fresh fruits and vegetables are kept. She had a basket into which she was putting the food she was planning to purchase in her hands, and she was walking along looking down into the food bins, not looking into the direction where she was walking. About half a minute before Mrs. Wu walked past the bin where the bananas are kept, a young boy was walking by that bin with his mother. While his mother was not looking, the young boy grabbed three bananas and threw them on the floor. About ten seconds later, another customer ran over the bananas with a shopping cart. They were smashed, and the peels and the fruit itself made a sloppy mess.- Mrs. Wu then turned down that aisle to shop, still looking into the bins, not at the floor. The clerk who works weighing and putting prices on the produce saw the bananas on the floor and called out to a co-worker and said, "Hey, there is a mess on the floor next to the bananas. Better clean it up!" (Of course, she said this in Chinese, but you get the point). The co-worker nodded, but had not yet started to move in the direction of the mess, when Mrs. Wu stepped on the bananas, fell, and broke her leg.- 1. Who, if anyone, is liable to Mrs. Wu for her injuries? Why?v