A company had the following assets and liabilities at the beginning and end of this year. a. Owner made no investments in the business, and no withdrawals were made during the year. b. Owner made no investments in the business, but did withdraw $15,000 during the year. c. Owner made no withdrawals during the year, but the owner did invest an additional $55,000 cash. d. Owner withdrew $15,000 during the year, but the owner did invest an additional $35,000 cash near year-end. Determine net income or net loss for the business during the year for each of the above separate cases: Note: Decreases in equity should be indicated with a minus sign