Prefix
no, capitalize the letter and put a period after it.
"an" always put "an" before a word starting with a vowel.
In a somewhat formal letter, you should put "yours sincerely" (if you know the person you are adressing by name) or "yours faithfully" (if you don't). If you know the person you are writing well, you can end with "best regards".
The letter before ach name is the genus name. The second is the species name.
The letter "I" makes the word "I" and can be put before "attend" to make the sentence "I attend".
Yes, in a formal letter or email, the comma is placed after the word "sincerely" before your name. For example: Sincerely, [Your Name].
you put the before and after
You Have to address it, and put a stamp on it.
At the bottom
at the bottom of the letter after your name. example: Sincerely, Your name cc
you should put 'an' before electric because the first letter of the next word is a vowel
You put their first name and last name.