By the end of this protocol: 1. AB:(A,NA) 2. BS:(B,NG:{(A,NA)}KeS) 3. SA:(NB{((B,K1NA)}KAS,{(A,B,K1NB)}KBS) 4. AB:({(A,B,K,NB)}KBS,{NB)K) State whether A is sure of B's identity, and if so, which single action must A perform to be sure of B's identity? 1- Yes. A receives {(A,B,K,NB)}KBS 2- Yes. A sends A 3- Yes. A sends {NB}K 4- Yes. A encrypts (A, B, K, NB ) 5- Yes. A receives NB 6- Yes. A decrypts {(B,K,NA)}KAS 7. Yes. A sends NA 8- Yes. A sends {(A,B,K,NB)}KBS 9. Yes. A encrypts NB 10- No. None of the actions A performs proves B's identity