Compute each part of given problem:
Problem: The human body can exhibit a wide range of resistances to current depending on the path of the current, contact area, and sweatiness of the skin. Suppose the resistance across the chest from the left hand to the right hand is 1.85 106?.
Part I: How much voltage is required to cause possible heart fibrillation in a man, which corresponds to 470 mA of direct current?
Part II: Why should rubber-soled shoes and rubber gloves be worn when working around electricity?
Please give me an explanation for this problem.