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