You are given an unknown solution. Based on the description…

You are given an unknown solution. Based on the description below, determine what cation/cations is/are present from the list of possible Groups 1 and 2 ions: After adding HCl in 1-A to the initially colorless unknown solution, a white precipitate formed with a colorless decantate. After Step 1-B, a precipitate was still visible and was separated from the decantate. After step 1-C, the solution was yellow with no precipitate. After step 1-D, the precipitate dissolved and subsequently, a white precipitate re-emerged after step 1-E. There was no apparent effect on the colorless solution after step 2-A. A white precipitate formed after adding aqueous ammonia in step 2-B, and a black solid appeared after step 2-C.