Fill in the blank space for the given series with the correct alternative.
$165, 195, 255, 285, 345, (...)$

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

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

How many such symbols are in the above arrangement each of which is immediately followed by a number but not immediately preceded by another number?

What will be the next term in the series: $BDF, CFI, DHL, ?$

Choose the correct alternative to complete the series: $c . . b a a . . . a c a . . c a c a b . . a c a c . . . b c a$

Choose the correct alternative for the missing term in the series: $eac, gee, ieg, ?$

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?

$QP@,MAH,@YZ,?$