X of Agra sends a letter by post to Y of Delhi offering to sell his car for Rs. 1,00,000. This letter, is posted on 1st January and reaches Y on 7th January Y sends his acceptance by post on 10th January but X receives this letter of acceptance on 15th January. Answer each of the following questions. (a) When is the communication of offer complete? (b) When is the communication of acceptance complete as against the offerer? (c) When is the communication of acceptance complete as against the acceptor? (d) If X sends a telegram on 8th January revoking his offer, and this telegram reaches Y before the letter of the acceptance is posted. Is revocation of offeris valid? (e) If Y sends a telegram on 14th January revoking his acceptance and this telegram reaches X before the letter of acceptance is received by X. Is revocation of acceptance is valid?