a) Joe was walking in a park and found a watch. He took it to the city's lost-and-found, but it was not claimed. Three years later, Joe went to the lost and found, asked for the watch, and was told that the watch was a property of the city.Explain Joe's legal position in these circumstances.

b) Joe wanted to start up a restaurant business. He did some research and found out McDonald's had not properly registered its trademark, the golden arches, in his particular area. Joe used a similar pair of arches over his restaurant and started business.Explain any danger he might face.