I have a biased coin, 60% Heads, 40% Tails. It pays $10 for Heads, $0 for Tails. Make a two-way market for me. If I immediately hit your bid, how do you adjust your quote?

我有一枚硬币，60%朝上，40%朝下。朝上给你10块钱，朝下0块钱。你会报什么双边价格（bid-ask）？如果我立马把硬币卖给你了，你会怎么调整你的报价？