Total stamps = number of people × average stamps.<br><br>
• Total stamps of 8 friends = 8 × 56 = 448<br>
• Total stamps of 10 people = 10 × 52 = 520<br>
• Total stamps of 2 new friends = 520 − 448 = 72<br>
• Average of 2 new friends = 72 ÷ 2 = 36<br><br>
Final Answer: 36