In which region and quadrant can the following organs be found?
a. Stomach – left hypochondriac region and epigastric region; left upper quadrant
b. Ascending colon – right inguinal region and right lumbar region; right lower quadrant
c. Descending colon – left lumbar region and left inguinal region; left lower quadrant
d. Urinary bladder – hypogastric region; in the middle of left and lower quadrants
e. Liver – epigastric region and right hypochondriac region; right upper quadrant
f. Appendix – right inguinal region; right lower quadrant