Steve met Diana at the local gym and they started talking about how Diana needed her house painted. Steve told Diana that he would paint her whole house for $5,000 and that he would keep the offer open for seven days. Later that night, Steve even sent Diana an email detailing the terms of the offer. Two days later, Steve sent Diana an email around 2:25 p.m., stating that the original offer was revoked. Around 1:55 p.m. that same day, Diana wrote Steve a letter, stating that she accepted his offer for the house painting. As soon as Diana was able, she went to Post Office and sent Steve the letter by certified mail (time stamped by the Postal Service at 2:27 p.m.). That night around 5:45 p.m., Diana was reviewing her emails and saw Steve's earlier email informing her about the revocation of the offer. She immediately called him to tell him that she had wrote him a letter of acceptance. Was the offer revoked by Steve and why or why not?