A 20-Kg Piece of Steel with a Temperature of 70 ^$\circ$

A 2.0-kg piece of steel with a temperature of 70 ^$\circ$ C is submerged in 1.0 kg of water at 15 ^$\circ$ C.At what temperature does the water/metal system reach equilibrium? The specific heat of steel is 0.107 cal/(g * K) .

A) 17 ^$\circ$ C
B) 25 ^$\circ$ C
C) 38 ^$\circ$ C
D) 42 ^$\circ$ C