B2 first 4 sb w/ans w/audio onl w/resource pk./b2 first 4 sb w/ans w/audio onl w/resource pkb2 first 4 sb w/ans w/audio onl w/resource pk./b2 first 4 sb w/ans w/audio onl w/resource pkb2 first 4 sb w/ans w/audio onl w/resource pk./b2 first 4 sb w/ans w/audio onl w/resource pkb2 first 4 sb w/ans w/audio onl w/resource pk./b2 first 4 sb w/ans w/audio onl w/resource pkb2 first 4 sb w/ans w/audio onl w/resource pk./b2 first 4 sb w/ans w/audio onl w/resource pkb2 first 4 sb w/ans w/audio onl w/resource pk./b2 first 4 sb w/ans w/audio onl w/resource pkb2 first 4 sb w/ans w/audio onl w/resource pk./b2 first 4 sb w/ans w/audio onl w/resource pk.