निम्नलिखित पांच त्रि-अंकीय संख्याओं के अनुक्रम पर विचार करें: (बायें) 876 643 453 974 227 (दायें) यदि दी गई श्रृंखला की सभी संख्याओं को बाएँ से दाएँ घटते क्रम (अवरोही क्रम) में व्यवस्थित किया जाता है, तो किस संख्या का स्थान अपरिवर्तित रहेगा?

Refer to the given number series and answer the question that follows. Counting to be done from left to right only. (Note: All numbers are single-digit numbers only.) (Left) 3 2 1 5 2 4 9 4 5 2 1 5 7 9 8 4 7 4 6 3 5 7 3 7 8 1 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 even digit?

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