The position(s) of how many letters will remain unchanged if each of the letters in the word ARMCHAIR is arranged in the reverse English alphabetical order?

If in the word VITREOUS all the consonants are first arranged alphabetically and then all vowels are arranged alphabetically which letter will be second to the right of fourth from the left?

This question is based on the following words.
COP, TIK, ANY, CAN, OWN
If in each of the words, each letter is changed to the next letter in the English alphabetical order, how many words thus formed will have no vowel?

Each letter in the word DUMPERS is arranged in the English alphabetical order. How many letters are there in the English alphabetical order between the letter which is fourth from the left end and the one which is second from the right end in the new letter-cluster thus formed?

Each letter in the word INJURED is arranged in the English alphabetical order. How many letters are there in the English alphabetical order between the letter which is second from the left end and the one which is fourth from the right end in the new letter-cluster thus formed?

The position(s) of how many letters will remain unchanged if each of the letters in the word ARMCHAIR is arranged in the reverse English alphabetical order?

The position(s) of how many letters will remain unchanged if each of the letters in the word ELECTRIC is arranged in reverse English alphabetical order?

Each letter in the word HARMFUL is arranged in the English alphabetical order. How many letters are there in the English alphabetical order between the letter which is third from the left end and the one which is third from the right end in the new letter-cluster thus formed?

Each letter in the word KNIFERS is arranged in the English alphabetical order. How many letters are there in the English alphabetical order between the letter which is second from the left end and the one which is third from the right end in the new letter-cluster thus formed?