Arrange the given words in alphabetical order and choose the one that comes first.
Problem,Probe,Proclaim,Probate,Proceed

If a meaningful word can be formed by rearranging the letters $USCALA$,the first letter of the word so formed is the answer. If no such word can be formed,the answer is $X$.

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?

$A$ group of letters is given which are numbered $1, 2, 3, 4, 5$. Below are given four alternatives containing combinations of these numbers. Select the combination of numbers so that the letters arranged accordingly form a meaningful word.
$R, P, E, D, I$
$1, 2, 3, 4, 5$

If the letters of the word $OBSERVANT$ are interchanged,such that the first becomes ninth,second becomes eighth,and so on,and the position of the fifth letter remains unchanged,then what will be the new arrangement of letters?

If it is possible to make only one meaningful word with the first,fifth,ninth and the tenth letters of the word $'AUTOMOBILE'$,which would be the second letter of the word from the right? If more than one such word can be formed,give $'Y'$ as the answer. If no such word can be formed,give $'Z'$ as your answer.