Choose the correct alternative to complete the series: $cccbb....aa....cc....bbbaa.....c$

These questions are based on the following letter/number/symbol arrangement. Study it carefully and answer the questions that follow.

$5, D,H,E, \star, 7,9, \$ ,F,I ,6 ,R ,\% ,L ,1 ,A,J, 3, B, \# ,4 ,@ ,K,P ,8, U,M, 2$

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

$E,D,H ,9 ,\star, 7, I,\$,F, ?, ?, ?$

Fill in the blank space for the given series with the correct alternative.
$11, 10, (...), 100, 1001, 1000, 10001$

These questions are based on the following arrangement. Study it carefully and answer the questions.
$J, \star, R, 3, P, L, 2, \#, I, N, 7, O, C, @, K, 5, D, =, M, \$, 6, B, >, A, Q, 4$
What will come in place of the question mark in the following series based on the above arrangement?
$PRJ, \# L3, 7I2, @ON, ?$

These questions are based on the following set of numbers.
$389 \quad 476 \quad 635 \quad 847 \quad 568$
Which number will be the smallest if the first and the last digits are interchanged in all the numbers?

Choose the correct alternative for the missing term in the series: $2, 6, 12, 20, 30, ?$