What are my chances? should i prepare for design for Meta

Gave my coding last week for Meta, have system design next week. Should I prepare?

Phone screen : Both optimised solutions

Onsite coding 1: Both optimised solutions
Onsite coding 2 : One correct optimised, one not brute but not best, coded completely

Update : in team match stage for E5
System design : Top K
All questions for leetcode top 100 for meta
1 hard question in each round.

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