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What is the possible sorting possible for the mentioned query dib.eventacreatelndex $($ "username": $1,$ "date" :$-1)$ IR

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db$.$events.findo.sort$(($username: $1,$ date: $-1\})$

db$.$events. find$(0.$sort$(($username: $-1,$ date: $1))$

db$.$events.find$(1.$sort$(($username: $1,$ date: $1))$

All of them