7. Suppose the initial states of composite systems AB, CD, and EF are given below. After the joint measurement of systems B and C, and D and E, the final state of the composite system AF is: 1 a. 8V2 (IH ) A IV ) F + IV ) A |H ) F) 1 b. 8v/2 (IH) A IV ) F - IV) A IH ) F) 1 C. 8V/2 (IH ) A IV ) F + IV ) A IH) F) 1 d. 8V/2 (IH) A |H ) F + (V ) A IV ) F) 1 e. 8V/2 (IH) A |H ) F - () AIV ) F) H V H V 1 f. 8V/2 (IH) A IH ) F - I)AIV) F) A B C D E F VS(H) A IV ) B - IV) A |H) B) (H)c IV) D - IV)c |H) D) VZ ( 1 H ) B IV ) F - IV ) BIH ) F)