Upgrade database from 11g to 12.1.0 for EBS R12.1.3 to R12.2

Dears,

i'm following the note id:1930134.1 to upgrade the database(version 11.2.0.4) of my EBS R12.1.3 to database 12.1.0

into Database installation steps 8 (Apply additional 12.1.0.1 RDBMS patches) i was requested to apply

...

4. For all Windows platforms
   • Windows patch 15 - Patch 19648840 or higher
   • Patch 16067188
   • Patch 16693399
   • Patch 16913149
   • Patch 16952749
   • Patch 17167867
   • Patch 17360098
   • Patch 18296565

...

Question1:

==> i noticed that all patches are for RAC , but in my case i'm not RAC ====> So why it's not mentioned that these patches are for RAC ?

into  Database Upgrade (steps 10), i was requested to run "drop table sys.enabled$indexes;" into source database, but these table is not there ?

Question2:

am i missing something?