Case #1: The maximum product is -5.
Case #2: The maximum product is 0.
Case #3: The maximum product is 20.
Case #4: The maximum product is 8.
Case #5: The maximum product is 20.
Case #6: The maximum product is 0.
Case #7: The maximum product is 8.
Case #8: The maximum product is 240.
Case #9: The maximum product is 0.
Case #10: The maximum product is 0.
Case #11: The maximum product is 0.
Case #12: The maximum product is 500.
Case #13: The maximum product is 60.
Case #14: The maximum product is 160.