Will approaches you for advice and says: 'On 1 August I saw the latest Samsung handphone at a very reasonable price at a shop in the Mall. I told the shop owner, Tony, that, I was interested in buying the handphone but would like to think about it for a few days. On 5 August I received a letter from Tony, stating that he was willing to sell the handphone at a rock bottom price of RM300. I immediately posted a letter of acceptance on the same day (5 August). Tony received my letter of acceptance on 8 August. The next day (6 August) I met my old classmate, Alfi, who said he was interested in buying a handphone. I asked him if he would like to buy the Samsung handphone that I was about to purchase from Tony, at RM600. Alfi said he would like to think about it and let me know. On 7 August Alfi posted a letter accepting my offer. This letter I received on 9 August. On the 7 August, I received a fax from Tony revoking his offer to sell the Samsung handphone. On 8 August I received a call from Alfi saying that he changed his mind and did not want to buy the Samsung handphone after all. He asked me to ignore his letter of acceptance that he had posted on 7 August.' Will now wants you to advise him on whether there exists a contract between:

(a) Will and Tony

(b) Will and Alfi