A $28\mathrm{.}2g$ sample of nickel is heated to $99\mathrm{.}8C$ and placed in a calorimeter containing $150\mathrm{.}0g$ of water at a temperature of $23\mathrm{.}5C.$ After the metal cools the final temperature of metal and water is $25\mathrm{.}0C,$ calculate the Cs of the nickel. Cs of water is $4\mathrm{.}18.$