You are lost in space but fortunately you have a space suit

Question

Compute each part of given question:

Question: You are lost in space. But, fortunately, you have a space suit. You need to keep your body temperature at 37 °C. You have a surface area of 2m².

Part A: Assuming that the surface of the space suit is 10 degrees . centigrade lower than your body temperature, what is the power of the suit's heating system. Assume an emissivity of 0.5.

Part B: If the battery pack for your suit contains 9 x 10⁵ Joules, how long do you have before things get cold?

I need help to determine how long you have before things get cold.