Answer to Question 1
Wt prior to pregnancy = 72.7kg = 160 lbs
Adjusted body weight = (actual body weight - IBW) .25 + IBW
= (160 - 125) .25 + 125
= 35 .25 +125
= 8.75 + 125 = 133.7 lbs
Answer to Question 2
Absorb water mostly, some electrolytes, and to act as storage area for waste until defecation.