Indicate whether the following contracts are valid, void, voidable or unenforceable.

$\backslash$table$[[\backslash$table$[[$Mary$,$ who has a court appointed guardian,$],[$buys a new TV on contract.$]],$I$],[$Alice has some mental issues and is not always,Valid$],[\backslash$table$[[$day to buy a new computer. She asks$],[$numerous questions about the computers.$]],\backslash$table$[[$Voidable$],[$Void$]]],[16$ year old rents an apartment.,$],[\backslash$table$[[$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.,$],[\backslash$table$[[$Joe passes out at a bar and his friend rouses$],[$him and offers him $$100$ for his brand new car,$],[$to which Joe agrees.$]],]]$