21. Dina is debating whether to attend college. Chris promises her $40,000 if she will attend college and graduate. Dina tells Chris that she agrees to this. She enrolls in a local college, attends full-time for four years, and graduates with honors. When Dina asks Chris for $40,000, Chris says, "I don't remember promising you $40,000. But if I did say that, it's not enforceable, because we didn't bargain over it. And even if you say you went to college because of this "offer" I supposedly made, I revoke it now." Can Dina enforce their agreement? Explain. 22. Sidney asked a neighbor, Tina, to water his front-yard flowers while he went on vacation. Tina agreed, and for three days, Tina watered the flowers without a problem. However, on the fourth day, Tina touched the outside faucet and received a violent electric shock that shot her through the air, melted her flip-flops and glasses, set her clothes on fire, and seriously burned her. Later, when she had recovered, Tina sued Sidney, claiming that he had caused the accident when he had negligently repaired a second-floor toilet. Experts testified that when Sidney's repairs were negligently done, water from the leaking toilet had flooded through the walls of the house, soaking wires and eventually causing the faucet to become electrified. You represent Sidney. Please list all of the element of a negligence claim and then tell me which one would be most helpful to Sidney's defense. Why