These questions are based on the following arrangement. Study it carefully and answer the questions.

$8 ,H ,\% ,3,7 ,T,A ,4 ,\# ,6 ,B,I ,@ ,R ,1 ,Q ,\star, L,E ,2 ,K ,\$ ,U ,5,9$

What will come in place of the question mark in the following series based on the above arrangement?

$7T3,4\#A,BI6,?$

Fill in the blank space for the given series with the correct alternative.
$1, 6, 13, 22, 33, (...)$

The following question is based on the five three-digit numbers given:
$513, 248, 371, 634, 167$
Which of the following is the middle digit of the second highest number among these numbers?

Choose the correct alternative to complete the series: $...bcc... ac..aabb... ab ...$

What terms will fill the blank spaces?
$Z, X, V, T, R, (...), (...)$

To answer these questions, study the following arrangement of digits, letters and symbols carefully.

$6, N,P ,=,@, 7,1 ,\& , R, T, 3, L, ,B, \star, E ,4,\# , 8, G,H ,\$, 5, K,M ,?, 2, D,C$

If all the symbols in the arrangement are deleted, which of the following will be the $4^{th}$ to the left of the $12^{th}$ element from the left end?