Find out the missing term in the following letter number series:

A3D    E4G    I7J    ?     Q29P

Find out the missing term in the following letter number series:

M 4, T 7, P 7, Q 10, S 10, N 13, ?, K 16

Find out the missing term in the following letter-number series:

R 5 P, T 6 M, V 9 J, X 15 G, ?

Find out the missing term in the following letter-number series:

If the letters in the following five groups of letters are first rearranged in the alphabetical order and then the groups of letters so formed are rearranged as in a dictionary, which letters are in the MIDDLE among the five letter-group?  

MEET, DEAF, ROAD, CODE, LACK