12. Mcq data structure class. C++

Please answer 12,13,14. Thank you

12) For the tree below, the depth of node H is a)o b)1 c)2 d) 3 13) For the tree below, the height is a) o b) 1 c)2 d) 3 e)4 14) For the tree below, the external nodes are a) D, E,F,G b) A BC c)HIJKLMN O d) none 0