In which of the following siftuations would the contract relating to land not be enforceable?

An unwritten agreement to have a garage built on the land

An unwritten sale of land where the seller allowed the buyer to enter the property and commence construction thereon

An unwritten lease for a term of five years

An unwritten lease of a lawn mower used to maintain the land

An unwritten sale of land where the sale was acknowledged in subsequent correspondence signed by the party denying the existence of the sale