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