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

Each of the following questions is based on the following alphabet series.
$A, B, C, D, E, F, G, H, I, J, K, L, M$
$N, O, P, Q, R, S, T, U, V, W, X, Y, Z$
If the letters of the given alphabet interchange positions,so that $A$ takes the place of $Z$ and $Z$ takes the place of $A$; $B$ takes the place of $Y$ and $Y$ takes the place of $B$ and so on,what will be the thirteenth letter from the right?

Each of the following questions is based on the following alphabet series.
$A, B, C, D, E, F, G, H, I, J, K, L, M$
$N, O, P, Q, R, S, T, U, V, W, X, Y, Z$
If the above alphabet is written in the reverse order,which letter will be the twelfth to the left of the sixteenth letter from your left?

Arrange the given words in alphabetical order and identify the one that comes last:
$Accumulate, Acquit, Actuate, Abandon, Achieve$

If the positions of the third and tenth letters of the word $DOCUMENTATION$ are interchanged,and likewise the positions of the fourth and seventh letters,and the second and sixth letters,which of the following will be eleventh from the right end?

If the first three letters of the word $COMPREHENSION$ are reversed,then the last three letters are added and then the remaining letters are reversed and added,then which letter will be exactly in the middle?