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The table below gives the solubilities of substances T and U at `10^oC` and `40^oC`

When aqueous mixture containing 55g of T and 12g of U at `80^oC` was cooled to `10^oC`, crystals formed.
(a) Identify the crystals formed.
(b) Determine the mass of the crystals formed.
(c) Name the method used to obtain the crystals.