Forum:Scrap goblin, reese ice mistress rulings

Hi, I want to clear up the rulings on a few card effects. First is the tuner monster card Scrap Goblin whose effect states "This card cannot be destroyed by battle. If this face-up Defense Position card is selected as an attack target, destroy this card at the end of the Battle Phase. If this card is destroyed by the effect of a "Scrap" card and sent to the Graveyard, you can select 1 "Scrap" monster in your Graveyard, except "Scrap Goblin" and add it to your hand". My question about this card is, if the monster is in face-up attack position and my opponent attack it, according to its effect it wont be destroyed but does damage calculation apply or not because it doesn't state it in the effect? Also if I have Scrap Goblin in face down defense position and my opponent attacks it, is it destroyed or not since its effect states it can only be destroyed if its targeted in face-up attack position? The second monster card Reese The Ice Mistress whose effect states "This card cannot be destroyed by battle with a Level 4 or higher monster". Again does this mean that if a level 4 of higher monster attacks Reese does damage calculation apply as normal eventhough it doesn't state it on the card?

Please help!