23. Which forms of security is the easiest to take advantage of: Unconditional letter of credit Performance bond Guarantee None of the above (a) and lb) above [DP-F1575\" 29. Which forms of security of payment requires involvement of a third party: a. Lien b. Letters of credit c. Guarantee d. None of the above e. (b) and (c) above 30. Which forms of security of payment affects a grantor's credit capacity: Lien Letters of credit Guarantee None of the above (in) and (c) above analogs"