Mary offered via a the post, to sell Patrick some items she got from overseas. She posted the offer on February 10, 2022 and was received on February 20, 2022. Patrick immediately sent his acceptance by post on February 20, 2022. Mary had decide against the offer and sent a letter to revoke the offer on February 12, 2022. Some days later, Patrick went to Mary to collect the items, only to be told that they were already sold. i. Was a valid contract made? ii. Is Patrick entitled to the items? iii. Was the revocation valid? iv. Describe one way in which a contract can be terminated..