Three $109\mathrm{.}0-g$ ice cubes initially at $0C$ are added to $0\mathrm{.}880$ kg of water initially at $19\mathrm{.}5C$ in an insulated container.

$($a$)$ What is the equilibrium temperature of the system?

Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. $C$

$($b$)$ What is the mass of unmelted ice, if any, when the system is at equilibrium?

Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. kg