choose valid, void, or voidable

Indicate whether the following contracts are valid, void, voidable Frank, who has Alzheimer's disease, walks away from home one day in the middle of a blizzard. He walks for miles and ultimately walks into a car dealership and buys a car. 16 year old buys a car on contract. Mary, who has a court appointed guardian, buys a new TV on contract. 16 year old rents an apartment. Joe passes out at a bar and his friend rouses him and offers him $100 for his brand new car, to which Joe agrees. Alice has some mental issues and is not always competent. She enters a computer store one day to buy a new computer. She asks numerous questions