A fair share scheduler computes the priority of a process based on which of the following?
(1) Processor utilization by the individual process.
(2) Weight assigned to the user/group.
(3) Processor utilization by the user/group.

Explanation

A fair-share scheduler aims to divide CPU time fairly among user groups rather than just among individual processes, so its priority formula has to account for how much CPU the individual process itself has used (1), the weight or share assigned to that process's user or group (2), and how much CPU the whole group has already consumed relative to its share (3). Omitting any one of these would break the fairness guarantee: for example ignoring group usage (3) would let a group running many processes starve other groups of equal weight. All three factors are therefore combined, making (1), (2) and (3), option (iii), correct.