Forum:Geminis and catoblepas and fate witch questions

Please some one answer me this questions about the gemminis, catoblepas and witch of fate and king of the swamp:

1º Resummon a Gemminis in defense: I know that if a gemminis was sumoned in defense i can resummon him in defense but, what happens if was before in atack? (for example if was summoned in the enemy turn by "Gemmini summoner") can i put him in my turn in defense mode and resummon it? oh i should put the monster in defense and wait another turn to summon it? 2º The "gemmini summoner" says if you pay 500 points he can normal summon one "Gemmini" monster from my hand but what happens with cards that need tribute to be summoned like "Phoenix Gearfried" he have more than 4 stars so he should need sacrifice, he can be summoned directly without sacrifice with the efect of "Gemmini summoner"?.

3º the "King of the Swamp" can be used with "The Elemental Hero Neos", this one for example: http://yugioh.wikia.com/wiki/Elemental_Hero_Air_Neos can i use "The king of the Swamp" to replace the other fusion material?, Or is like "future fusion" and the "King of Swamp" can't be used for this fusion?

4º "Catoblepas and the witch of the fate", this cards says: that when a monsters is special summoned you can discard one monster from the graveyard with "?" atack and destroy the monster. the "?" means anyone?, the same?, i say because when is the same usually they put a "X",or if there is anyone they write it, but the card don't say "anyone" but is not write also "X" and don't say what is exactly the "?".