निम्नलिखित में से कौन-सा अक्षर-संख्या समूह दी गई श्रृंखला में प्रश्नचिह्न (?) के स्थान पर आएगा? UDF6, VFI9, ?, XJO15, YLR18, ZNU21

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

Refer to the following letter-symbol series and answer the question. Counting is to be done from left to right only. (Left) & € # Y J £ M & N K V £ N % % & # Z P * J I (Right) How many such symbols are there each of which is immediately preceded by a letter and also immediately followed by a symbol?