阅读下列材料，按要求完成各题。

    This is Mr. Wilson's room. It's clean and tidy. It looks like（像） a nice picture. The walls are white and the window is big. You can see a photo of his family and a photo of his girlfriend on the wall. His girlfriend is Peggy Carmen. A yellow desk is near the window. You can see some green plants and five colorful flowers on it. A blue clock is on it, too. It is seven now. A baseball is under his bed. His T-shirt and his bag are on the bed. Look! What's that in the drawer(抽屉) of the desk? Oh, it's Mimi, a cat. It's black. It looks like a hat.

如图，△ABC的三个顶点都在方格纸的格点上，其中点A的坐标是（－1，0）．现将△ABC绕点A顺时针旋转90°，则旋转后点C的坐标是____．

已知⊙O₁与⊙O₂的半径r₁=2、r₂=4，若⊙O₁与⊙O₂的圆心距d=5．则⊙O₁与⊙O₂的位置关系是____ .