How does the payouts of capital gains in hedge funds work if you are a investor?

Let's say you have 5 clients in a hedge fund who invested the following capital:

1. 10 million
2. 20 million
3. 50 million
4. 100 million
5. 200 million

Let's pretend that in this 380 million hedgefund that the fund gained 10% for the year. Let's ignore the entry and management fees for a moment and pretend that the client keeps all the profits. Here are my questions:

1. If client 3 withdraws their money, they are entitled to their investment +10% correct?
2. Do hedge funds(this one for example) trade in 5 seperate accounts, each account per client accountable for their individual gains/losses or do they pool all their capital together? Like, is it possible for client 4 to lose money and client 5 to gain money in the same quarter because they had different trades in their individual accounts?
3. If you are client 1, can the hedgefund say something like, "Sorry, we didn't have to use your small 10 million capital this year, therefore, you are not entitled to any of our profits because your money was idle".