Sequence Questions

Examine the following sequence closely and respond to the question that follows.
$$\text{R K 5 9 \# B 2 \% * E ? A 8 L \$ I 4 S V 7 ! C 6 N @ H 1 3 \& D}$$

Determine the next term in the series:

$$\text{5\#2, *?8, \$4V, \_\_\_\_\_\_\_}$$

Observe the following series carefully and answer the question that follows.
$$\text{C}\$1\%\text{E}721\text{@}\text{I}\ast \#\text{@}\text{A}7\ast \#>8\text{U}>$$

How many numbers are followed by an alphabet if the second half of the series is reversed?

Direction: Study the following alphabetical sequence and answer the question based on it.
$$\text{GAGHUTAAKHGAOYYDKKVRABICDDCRFFAHAHAIH}$$

If we write the letters of the above series in the reverse order, which letter is the middlemost?