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Q2 3 Points Answer the following questions on the tree below. 11 2 20 6 30 Q2.1 1 Point In iterative preorder traversal, what are

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Q2 3 Points Answer the following questions on the tree below. 11 2 20 6 30 Q2.1 1 Point In iterative preorder traversal, what are the contents of the stack right after popping 20? O the stack is empty O 11 O 30 O1 Save Answer Q2.2 1 Point In iterative inorder traversal, what are the contents of the stack right after popping 20? O the stack is empty O 11 O 30 01 Q2.3 1 Point In iterative postorder traversal, what are the contents of the stack right after popping 20? O the stack is empty O 11 O 30 0 1 Save

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