Prepare journal entries to record each of the following four separate issuances of stock.

1. A corporation issued 7,000 shares of $20 par value common stock for $168,000 cash.
2. A corporation issued 3,500 shares of no-par common stock to its promoters in exchange for their efforts, estimated to be worth $50,000. The stock has a $1 per share stated value.
3. A corporation issued 3,500 shares of no-par common stock to its promoters in exchange for their efforts, estimated to be worth $50,000. The stock has no stated value.
4. A corporation issued 1,750 shares of $50 par value preferred stock for $137,500 cash.