1. Frank is a loyal employee who has spent much time above and beyond the call of duty promoting his employer's company on weekends. Frank's boss says to him, "Because of all this extra work you have done, you'll get a $1,000 bonus next month." Can Frank claim the bonus if the boss changes his mind

2. George notices a dog tied to a chain behind a fence and recognizes it as belonging to an acquaintance who lives a couple of blocks away.George goes to the acquaintance's house and says, "Your dog is tied up in someone's yard, and for $100 I will tell you where." The dog's owner says, "No way! I can't believe you won't simply tell me where the dog is!" The dog's owner drives around the neighborhood and finds the dog and retrieves it. The next day George notices an advertisement in the paper where the owner offered a reward of $200 for information leading to the return of her dog.What happens if he goes to court to ask for the reward?

3. Kristin offers to sell land to Ian for $5,000. Ian says that $5,000 is too much, but he will pay $4,000. Kristin says no. Two days later, Ian accepts Kristin's original offer. Do we have an enforceable contract? Why? Why not?