Find the missing letters for the given series from the given alternatives.
$ccbab....caa.....bccc.....a.....$

Choose the correct alternative to fill in the blanks in the series: $ba....b...aabb....a........a...bb$

Study of the following arrangement carefully and answer the questions given below.

$Q,E ,* ,P,M ,8 ,R,A ,@ ,C ,9 ,U,H,W, \# ,J,Z, ,S, \beta, Y,N ,5 ,\$ ,G,I,T$

What should come in place of the question mark $(?)$ in the following series based on the above arrangement?

$QP@,MAH,@YZ,?$

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

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

Four of the following five are alike in a certain way based on the positions of the elements in the arrangement and hence form a group. Which one does not belong to the group?

Fill in the blank space for the given series with the correct alternative.
$0.5, 1.5, 4.5, 13.5, (\ldots)$ (in $.5$)

Choose the correct alternative to complete the series: $ab . . aa . . bbb . . . aaa . . bbaa$