Please help me understand and find the correct answers to the following:

Shep Company's records show the following information for the current year. Determine net income (loss) for each of the following separate situations. Note: For all requirements, losses should be entered with a minus sign. a. Additional owner investments of $5,400 were contributed, and withdrawals of $9,400 were made during the current year. b. Additional owner investments of $15,600 were contributed, and no withdrawals were made during the current year. c. No additional owner investments were contributed, and withdrawals of $14,400 were made during the current year