In دَخَلْتُ الْمَدْرَسَةَ وَأَخَاكَ, which analysis is correct?

Maf'ul Ma'ahu: The Accompanying Noun

• Both mansub nouns have exactly the same role
• الْمَدْرَسَةَ is the entered place, while أَخَاكَ is the companion
• أَخَاكَ is the verb and الْمَدْرَسَةَ is the subject
• The waw is a preposition