One cubic foot (1 ft3 ) of seawater weighs about 64 pounds. suppose you pour one cubic foot of seawater into a light plastic bag, tie the bag closed with no air bubbles inside, and lower it into the ocean via a light attached string. when the bag of seawater is completely submerged, how much force do you have to exert on the sting to hold it up: a. 0 lbs b. 32 lbs c. 64 lbs d. 128 lbs e. you have to push it down because it tends to come up. circle your answer and explain your reasoning.