1.Sam has been caring for Alice, his elderly mother, for the past 10 years. Alice has been physically ill for the great majority of that time and Sam has devoted much of his time to providing care for her. Alice lives in her own house, and pays for all of her own expenses, but does not pay Sam anything for all of the time he spends caring for her. Sam has two siblings who live 2,000 kilometres away and are, therefore, unable to help care for Alice. Alice has reached the point where she must leave her own home and enter a long-term care facility. Alice will be selling her house when she moves. Alice's house has been appraised as being worth $250,000. Sam has been looking for a house as he no longer wishes to live in his apartment. Alice offers to sell Sam her house for $50,000, as she is very grateful for all of the time Sam has spent caring for her. Sam has a friend who is a real estate agent who will help them draft a contract of sale. What legal issue could arise if Sam does not take the necessary precautions to prevent this transaction from being overturned? (5)