Alkaline earth sulphate that is least soluble in water

Which of the following alkaline earth metal sulphate is least soluble in water:-

Which of the following alkaline earth metal sulphate is most soluble in water-

Which of the following alkaline earth metal sulphate is most soluble in water?

An alkaline earth metal, sulphate is soluble in water its hydroxide is not soluble in water and its oxide does not form rock salt structure, then metal is:

An alkaline earth metal, sulphate is soluble in water its hydroxide is not soluble in water and its oxide does not form rock salt structure, then metal is:

Which of the following alkaline earth metal suphate salt is the least soluble in water?

Which alkaline earth metal hydroxide is most soluble in water?