Consider this tree and from the statements below select those that are true. Note that the numbers in the circles are the keys.

Node with key $67$ is a right child

It is binary search tree

Node with key $53$ is the left subtree of node with key $81$

Node with key $35$ is an acestor of node with key $22$

It is a full $($proper$)$ binary tree

Node with key $76$ is a descendent of node with key $90$

It is a complete binary tree

Node with key $88$ is a leaf