Answer:
the answer is "will" because it is accompanied by have
Step-by-step explanation:
Future Perfect Tense is used to express an action which, the speaker assumes, will have completed or occurred in the future. ... This tense is also sometimes used to express completion of an action in future before another activity happens. e.g. She will have learnt the Chinese before she moves to China. The FUTURE PERFECT TENSE indicates that an action will have been completed (finished or "perfected") at some point in the future. This tense is formed with "will" plus "have" plus the past participle of the verb (which can be either regular or irregular in form): "I will have spent all my money by this time next year.