Which two statements are correct about fault-tolerant groups?

Fault-tolerant groups implement a K of N active strategy (K member of a group is activewhile N-K members are passive).

Members of a fault-tolerant group are ranked by means of the specified member weight, which must be a unique value within the fault-tolerant group.

Members of a fault-tolerant group are ranked by means of the specified member weight. Members with equal weight are ranked by the time they joined the fault-tolerant group.

The members of a fault-tolerant group are ranked by means of the specified member weight. Members with equal weight are ranked by non-deterministic means opaque to programs.

Members of a fault-tolerant group are ranked by means of the specified member weight.