Prepare journal entries, if required for the following items, which I don't understand?

1)Sold 250,000 shares common stock at $5 cash each, $.01 par value

2)Bought back 1,000 shares of company common stock at $6 a share to use for management incentives etc.

3)Issued 100,000 shares of preferred stock for cash, $0.10 par value, for $30 a share.

4)Company declared a 2 for 1 stock split when there were 2,000,000 shares outstanding.