Problem Four: (10 Points) For GM stock, the IY at-the-money forward implied volatility is 8.25%. The same maturity 25-delta risk reversal skew is 1.5% and the butterfly kurtosis is also 1.0%. Do you have enough information to determine the volatility on the 25-delta call? If so, what is it if not then what additional information is required? What about the 10- delta call or 6-month 25-delta call? Problem Four: (10 Points) For GM stock, the IY at-the-money forward implied volatility is 8.25%. The same maturity 25-delta risk reversal skew is 1.5% and the butterfly kurtosis is also 1.0%. Do you have enough information to determine the volatility on the 25-delta call? If so, what is it if not then what additional information is required? What about the 10- delta call or 6-month 25-delta call