In the following alphabet series,which letter is eighth to the left of the sixteenth letter from the right end?
$A, B, C, D, E, F, G, H, I, J, K, L, M$
$N, O, P, Q, R, S, T, U, V, W, X, Y, Z$

Arrange the given words in alphabetical order and choose the one that comes first.

How many meaningful words can be made from the letters $AEHT$,using each letter only once?

Find which one word cannot be made from the letters of the given word: $PROGNOSTICATION$.

In the following list of letters,how many $O$'s are followed by $Q$'s but not preceded by $D$'s?
$D, O, Q, O, D, Q, O, D, O, D, Q, D, O, Q, D, S, D, Q, P$
$O, Q, D, S, S, S, D, O, Q, O, Q, D, O, Q, D, D, O, Q$

If it is possible to make a meaningful word with the first,the fourth,the seventh and the eleventh letters of the word $INTERPRETATION$,which of the following will be the third letter of that word? If more than one such word can be made,give $M$ as the answer and if no such word can be made,give $X$ as the answer.