What should come in place of the question mark (?) in the given series based on the English alphabetical order? MIC, QMG, UQK, YUO, ?

Each letter in the word WEIGHTS is changed to the letter immediately preceding it in the English alphabetical order. How many vowels are there in the group of letters thus formed?

Refer to the given letter series and answer the question that follows. (Left) P R A T E E K S A R I K A V I J E N D R S U R N D R B I N T O (Right) How many letters are there in the English alphabetical order between the letters that are fifth from the right end and third from the left end of the series?