a solid iron sphere and a solid lead sphere of the same size are each suspended by strings and are submerged in a tank of water. Which of the of the following statements are valid? (more than one may be correct). (A) the buoyant force on each is the same. (B) the buoyant force on the lead sphere is greater than the buoyant force on the iron sphere because lead has the greater density. (C) The tension in the string supporting the lead sphere is greater than the tension in the string supporting the iron sphere. (D) the buoyat force on the iron sphere is greater than the buoyant force on the lead sphere because lead displacees more water. Please explain why or why not for each choice.