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 lower quadrant
d. Urinary bladder – hypogastric region, in the middle or right and left lower quadrant
e. Liver – right hypochondriac and epigastric region, right upper quadrant
f. Appendix – right iliac region, right lower quadrant