6. A man and a woman (both electrically neutral) are standing 10 m apart. a. What negative charge must be transferred from the man to the woman so that they exert a 200 N electric force on each other? b. What is the total mass of the particles that must be transferred to achieve this? 7. Estimate the total number of electrons in the human body. Describe your mathematical method and the assumptions that you make. What percentage of this number was transferred from the woman to the man in the previous problem?