Solution:The given sentence is in future perfect tense and in ac-tive voice. Look at the structure of active and passive voice of future perfect tense.Active voice: subject + will + have + v + object.
Sheetal will have finished the work.
Passive Voice: subject (object of active voice) + will + have been + v³ + by + object (subject of active voice).
The work will have been finished by Sheetal.