What is the simple subject in this sentence? my old red boots are too tight now. a. boots b. my old red boots c. are d. too tight

Study the e-mails formatting. what changes are needed to correct it? check all that apply. 1. the salutation should use a colon. 2. the space between the salutation and the body should be deleted. 3. the second paragraph should be indented. 4. the closing should say, “best wishes.” 5. the signature should come after the closing.