Heat And Thermodynamics

$15$ g of ice at $0^\circ\text{C}$ is added to a vessel containing water at $40^\circ\text{C}$. The mass of water and water equivalent of the vessel is $60$ g. Assuming that negligible heat is taken from the surroundings, the final temperature of the mixture will be
[ $L_{\text{ice}} = 80\,\text{cal/g}$ , $S_{\text{water}} = 1\,\text{cal/g}$ ]