Question 2 1 pts A down-and-out put has barrier $20 and strike $30. The put expires after four time steps when the underlying is expected to have values $50, S40, $28. $22 or $18. What are the possible values of the put at expiry? O $0, $10 ot $20. $0, $2, $8 or $12. $0 or $12. O $0, $2 or $8