If 4.0 g of steam at 100.0°C condenses to water on a burn victim's skin and cools

Question:

If 4.0 g of steam at 100.0°C condenses to water on a burn victim's skin and cools to 45.0° C, (a) how much heat is given up by the steam?
(b) If the skin was originally at 37.0°C, how much tissue mass was involved in cooling the steam to water? See Table 14.1 for the specific heat of human tissue.