Russia's MiG-25's

What the heck……I’ve got a thread on the Foxhound so why not one on the Foxbat.

I’m rather curious about the MiG-25R variants…..the RB in particular.

What was the maximum weapons load? Did it have five hardpoints like the MiG-25PD or three (i.e. one under each wing plus the centerline).

Were bombs smaller than 250-kg ever carried? What was the maximum number of 250, 500, and 1,000/1,500-kg weapons that could be carried?

Oh, and was R-60 support ever featured on any MiG-25 aside from the MiG-25PD? The R/RB/BM variants I’m especially curious about R-60 support for.