Refer to the following number and symbol series and answer the question that follows. Counting is to be done from left to right only. (Note: All numbers are single digit numbers only). (Left) 4 7 + $ £ 3 & 8 5 @ 1 Ω # * % 6 2 9 (Right) How many such numbers are there each of which is immediately preceded by another number and also immediately followed by another number?

Refer to the following letter series and answer the question that follows. Counting to be done from left to right. (Left) S I C X Z O A K L N T E W A Q D F H G U K O (Right) How many such consonants are there, each of which is immediately preceded by a vowel and also immediately followed by a vowel?

Refer to the following letter and symbol series and answer the question. (Counting is to be done from left to right only): (Left) J W @ M E V ~ & P T ¥ G R Y € ! K C ◇ A D £ % B F $ I S L < Q % X Z (Right) How many such symbols are there each of which is immediately preceded by a letter and also immediately followed by another symbol?