What should come in place of the question mark (?) in the given series based on the English alphabetical order? STA, WXE, ABI, EFM, ?

What should come in place of the question mark (?) in the given series? 17, 22, 32, 47, 67, ?

What should come in place of the question mark (?) in the given series? 6 8 ? 18 26 36

Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete? CYB 48 DZC 53 EAD 58 FBE 63 ?