If the tank is big enough. (40 gallons per dragon at the minimum)
Never house reptiles together that are not found naturally in the same area ! Bearded Dragons a native to Australia - Swifts are a native species of America !
No bearded dragons need lots of room
only need, being, cleaning and care of habitat/ cage. Otherwise , naturally bearded dragons never leave their homes/habitat/cage.
about $100
You can put it back in its cage after it takes a bath.
Whether or not you can keep them both alive in the same cage may have a different answer.
Its not recommended to house 2 dragons together, especially when their ages differ so greatly. Males will end up fighting, typically to the death, females can end up with serious injuries and dominance issues and male/female housing leads to over breeding.
Absolutely not ! They are completely separate species requiring totally different living conditions. They need different temperature ranges, different cage 'furniture' different foods, different humidity....
It depends on the size of the cage, although normally the amount of sand should be a few cenimeters thick.
No ! The Monitor will attack your Beardie over territory - Do NOT put them in the same cage !
no it won't they compete against each other in a fight.
Dragons are mythical creatures. Depending on different authors and directors, dragons and other mythical creatures are always different. Okay obviously that isn't a helpful answer, so I will move it to bearded dragons for you.