Hey help me pls i need help

"princess tower" in dubai is considered the world's tallest residential building, towering to 1 0 1 101 floors! t ( n ) t(n) models the number of tenants living on floor n n of the tower. what does the statement t ( 2 0 ) = t ( c ) t(20)=t(c) mean?

Which one ? is the answer and how to find this answer

Can someone me with the property questions for 12 13 and 14 plz