Binary Search Trees - General Questions

The keys 25, 45, 50, 20, 80, 30, 60 are inserted in this order into an empty binary search tree. What is its postorder traversal?

The keys 25, 75, 50, 45, 15, 55, 40 are inserted in this order into an empty binary search tree. What is its preorder traversal?

The keys 20, 35, 55, 15, 25, 30, 60 are inserted in this order into an empty binary search tree. What is its inorder traversal?

The keys 80, 25, 30, 55, 70, 20, 75 are inserted in this order into an empty binary search tree. What is its preorder traversal?

The keys 30, 20, 75, 25, 40, 35, 80 are inserted in this order into an empty binary search tree. What is its preorder traversal?