​How many such pairs of letters are there in the word DAUGHTER (in both forward and backward directions) which have as many letters between them in the word as there are in the English alphabetical order?​

Refer to the following letter sequence and answer the question :
(Left) S B T M R E S I C Z Y O W A P D F H G U L (Right)
Which letter is fifth to the right of the twelfth letter from your right end of the given sequence ?

Study the given letter series and answer the question that follows.
(Left) H A D W V Q T S P E R S T K E L M T  (Right)
How many such vowels are there each of which is immediately preceded by a consonant and also immediately followed by a consonant?

The position of how many letters will remain unchanged if each of the letters in the word BRACKET is arranged in alphabetical order?

Refer to the following letter series and answer the question.
(Left) B E S U Y N OA P S B G S AX T G (Right)
How many letters are there in the English alphabetical series between the letter which is sixth from the left end and the letter which is fifth from the right end of the given series?