Refer to the given string and answer the following question: (Left) Σ 5 U £ ± 2 W @ 3 K 9 ÷ ŷ 6 M & 4 A α 5 G δ 7 B % R Ø 4 (Right) If the sequence of the middle eight elements in the given string is reversed, then which of the following elements will be eighth to the right of the twenty-first element from the right end?

Refer to the following letter, number, and symbol series and answer the question. Counting is to be done from left to right. All numbers are single-digit numbers. (Left) M @ 1 6 G % K = P & H 5 R C ^ V ? 2 # R ! 4 (Right) How many such symbols are there, each of which is immediately preceded by a letter and also immediately followed by a number?

The question is based on the following sequence: W 1 R % 4 J E # 7 M T 2 1 9 B H 3 A $ 9 F Q 5 D G 6 U S P What should come in the place of the question mark with regard to the above sequence? R4# M2B 3Q ?