Bruno and Diana are trying to calculate their gross income. Which of the following items should they exclude from their gross income? 1. $15,000 gift from Diana’s mother for the down payment of their new house. 2. $20,000 borrowed by Bruno and Diana from First City Bank. 3. $12,000 increase in value of Delta stock, which they own in their brokerage account. 4. $53,000 worth of home repair work that was exchanged for tax work by Bruno.