The revision which would make the email more formal is;
Formal writing as the name implies is any type of writing that's written formally. On this note, formal is characterized by following social rules, conventions and etiquette which means to write in a short, concise manner to convey information.
The use of the slang, TTYL as used in the email denotes the informal nature of the email. On this note, in a bid to make the email more formal, it is important to remove the contractions, slangs and casual speech.
Read more on formal writing;
https://brainly.com/question/199613
Answer:
removing the contractions
removing the exclamation points
removing the slang and casual speech
Explanation:
