Q18-21: Let the current spot rate be 1.21 Sf/$. Let the exercise price be 1.20 $/. Let the volatility of the swiss franc be 0.26. The time to expiration is 3 months. The US rate is 2% and the swiss rate is 4%. 18. What is the delta of the call? 19. What is the value of the call? 20. What is its time value? 21. What is the value of the corresponding put? Q18-21: Let the current spot rate be 1.21 Sf/$. Let the exercise price be 1.20 $/. Let the volatility of the swiss franc be 0.26. The time to expiration is 3 months. The US rate is 2% and the swiss rate is 4%. 18. What is the delta of the call? 19. What is the value of the call? 20. What is its time value? 21. What is the value of the corresponding put