Which TWO of the following statements regarding acceptance of an offer are correct?
(1) Acceptance does not need to be communicated in a unilateral contract
(2) If two identical offers between two parties cross in the post, then one will be regarded as acceptance of the other
(3) Under the postal rule, a letter of acceptance that has been posted does not have to be received by the offeror to be valid acceptance
(4) If no method of communicating acceptance is stated in the offer, then acceptance must be made by post