$9\mathrm{.}1.$ Bubba$$s New Enterprise

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Bubba wants to go in the lie detection business and sees the logo of his firm $$The complete Truth$$ already on his truck. Going back to some instrumentation notes Bubba came up with the circuit for a lie detector below. The person interrogated will hold in one hand Electrode $+$ and in the other Electrode $-.$ The resistance of an adult measured from hand to hand is typically $500$W$.$ The voltage source is a sine wave with an amplitude of $1\mathrm{.}0$ V and a frequency of $50$kHz$.$