Question $512$ pts Consider the $4$ processes below, where A$,$ B$,$ C$,$ D are arbitrary computations: process $1$: process $2$: process $3$: process $4$; P$($s$1)$; P$($s$2)$; P$($s$1)$; P$(51)$; A; B; C; D; V$($s$2)$; V$($s$1)$; V$($s$1)$; V$($s$2)$; The initial semaphore values are: s$1=0,$ s$2=1$ Assuming that all processes start concurrently, what are the possible sequences of executions of A$,$ B$,$ C$,$ D after all processes stop executing? OB$,$ C$,$ A O BAD DA$,$ B$,$ C$,$ D $0$ BD B$,$ C$,$ D OB$,$D$,$ A$,$ C $,$ OB$,$D$,$ C