Answer:
third person.
Step-by-step explanation:
if it were speaking in 1st person, it would have sounded like this, we were plotting on the boys, we had an elaborate prank planned for the last day of school. 1st uses words like me, us, we,and i.
if it were second person it would sound like this, you were plotting on the boys, you had an elaborate prank planned for the last day of school. 2nd person uses words like you or yall.
third person usees words like he she or them.
hope this helped!!