7. Put-call parity for American options on a non-dividend-paying stock requires that S, - X S, - XB(1,1). b. In part a, show that if the written call option is exercised before maturity that you will generate a strictly positive payoff if you unwind/liquidate your whole portfolio. c. Use an arbitrage table to illustrate the arbitrage opportunity if the first inequality is violated, i.e., C(S.X.t.T)-P(S. X..T)S, - XB(1,1). b. In part a, show that if the written call option is exercised before maturity that you will generate a strictly positive payoff if you unwind/liquidate your whole portfolio. c. Use an arbitrage table to illustrate the arbitrage opportunity if the first inequality is violated, i.e., C(S.X.t.T)-P(S. X..T)