What would be the effect on free cash flows of each of the following items (be sure to include specifically whether "increase" or "decrease/reduce," and by what dollar amount) Explain your answer and why:

a. Purchase of $350,000 of fixed assets

b. Sale of $250,000 of book value fixed assets for a loss of $80,000

c. A $200,000 increase in net working capital

d. Issuance of $500,000 of first mortgage bonds