If in the English alphabet, every even-positioned letter beginning from B (B, D, F...) is replaced by odd numbers beginning with 3 (3, 5, 7...), which letter/number will be the third to the right of the tenth element counted from your right?

Each vowel in the word (Left) GRAVITY (Right) is changed to the letter immediately following it in the English alphabetical order and each consonant is changed to the letter immediately preceding it in the English alphabetical order. Which of the following letters will be second from the right in the new group of letters thus formed?

Suppose the first and second letters of the English alphabet interchange their positions, the third and fourth interchange, and so on up to the end (Z). If all the vowels (A, E, I, O, U) are removed from this new arrangement, which letter will be third to the right of the eighth letter from the right end?