An out-oftown friend is staying with you. While you're enjoying physics class, they eat your favorite dessert. After class, you look forward to that sugar fix, but are horried to find it missing. You ask about it, they deny any involvement, but you're skeptical. With your physics knowledge, you strap them to a chair, set-up a simple circuit that includes their body (e.g., connect one wire to finger on one hand, and another to finger on the other), as well as an ammeter to show any current that moves when a small voltage is applied. Then you start grilling your friend with questions. How do you think this whole set-up might indicate they're lying to you