In which region and quadrant can the following organs be found?
a. Stomach - epigastric, umbilical, and hypochondriac regions; left upper quadrant
b. Ascending colon - Right lumbar region; right lower quadrant
c. Descending colon - Left lumbar region; left lower quadrant
d. Urinary bladder - hypogastric region; center of the right lower and left lower quadrants
e. Liver - right hypochondriac, epigastric, and left hypochondriac regions; right upper and left upper quandrants
f. Appendix - right iliac region; right lower quadrant