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 lower quadrant
c. Descending colon - left lumbar region, left upper quadrant
d. Urinary bladder - hypogastric region, left lower quadrant
e. Liver - right hypochondriac region, right upper quadrant
f. Appendix - right iliac region, right lower quadrant