William was a printer of a small private line of comic books concerning the superhero "Catalyst," a scientist whose superpowers include the ability to accelerate the speed of chemical and physical reactions.He often sold his comic books through a small comic bookstore in his local community, "The Comics Stop."He had just completed the printing run of what he thought was the best issue in the Catalyst series, and, on April 14, he sent The Comics Stop a written offer by e-mail to Melissa, the owner of The Comics Stop, inviting The Comics Stop to buy the entire 1000-issue run for $5.50 per comic book.The written offer required The Comics Stop to accept the offerin writingbefore the close of business on April 18.On April 15, after learning from his accountant that he would be getting a large income tax refund, William decided that he was going to take a chance to promote his business at the Comic Con in San Diego in June.He wrote a letter to Melissa, the owner of The Comics Stop, on April 16 advising her that he was revoking the offer to sell the 1000-issue run to The Comics Stop.He decided that it was best to send the revocation by US Mail, andhe mailed the revocation letter at 2:30pm on April 16 at the local post office.

Meanwhile, Melissa also had received good news on April 15 from the business' accountant concerning its prior year's financial results.Melissa decided that The Comics Stop could take on the challenge of selling all 1000 copies of the latest Catalyst issue.She sent an e-mail message to William just before 5:00pm on April 16advising him that The Comics Stop was accepting the offer to purchase the entire 1000-issue run and asking for wire information for her to arrange to pay the purchase price.She put a return-receipt on the e-mail message.She did not hear from William on April 16 or April 17, butin the mail delivered to The Comics Stop on April 18was the revocation letter that William had sent to her.She immediately contacted him, advising him of her acceptance of the offer, and a few hours later received the return receipt indicating that William had read her e-mail message.William refused to sell her the run of the latest Catalyst issue.She then sued him in the local court seeking enforcement of her contract with William.

1.Was the acceptance of the offer that Melissa sent effective?If so, when was it effective?

2.Was the revocation of the offer that William sent effective?If so, when was it effective?

3.Was there a valid contract between William and The Comics Stop?Please analyze all the necessary requirements for this potential contract.

4.Does the UCC apply to this potential contract?Why or why not?