وَبَنَيْنَا فَوْقَكُمْ سَبْعًا شِدَادًا ۝١٢ Which analysis of فَوْقَكُمْ is correct?

Surah An-Naba — Part 2

• An adverb of place annexed to كُمْ
• The subject of بَنَيْنَا
• An adjective of سَبْعًا
• A negative particle