Refer to the following number series and answer the question that follows. Counting to be done from left to right only. (All numbers are single-digit numbers only.) (Left) 2 7 4 9 3 5 7 6 4 5 6 4 1 9 5 1 3 5 8 4 2 7 8 4 2 6 (Right) How many such even digits are there each of which is immediately preceded by an even digit and also immediately followed by an odd digit?

Refer to the following series and answer the question that follows (all numbers are single-digit numbers only). Counting to be done from left to right only. (Left) 3 1 7 1 2 2 9 3 5 8 9 2 4 3 2 4 4 3 5 9 4 3 3 (Right) How many such even digits are there, each of which is immediately preceded by an even digit and also immediately followed by an even digit?

Refer to the following number series and answer the question that follows (all numbers are single-digit numbers only). Counting to be done from left to right only. (Left) 4 9 4 8 3 3 3 1 4 7 8 7 1 7 2 9 1 3 5 1 5 9 6 4 8 4 6 (Right) How many such odd numbers are there, each of which is immediately preceded by an odd number and also immediately followed by an odd number?