In which region and quadrant can the following organs be found?
a. Stomach — epigastric region; left upper quadrant
b. Ascending colon — right lumbar region; right upper quadrant
c. Descending colon — left lumbar region; left upper quadrant
d. Urinary bladder — hypogastric region; left/right lower quadrant
e. Liver — right hypochondriac region; right upper quadrant
f. Appendix — right iliac region; right lower quadrant