Given a graph as follows,

$(1)$ please judge whether it is a tree? And describe your reas

$(2)$ give the vertex degree, and the tree degree.

$(3)$ give the Child vertex, Parent vertex and Sibling vertex o

Given a graph as follows,

$(1)$ please judge whether it is a tree? And describe your reason.

$(2)$ give the vertex degree, and the tree degree.

$(3)$ give the Child vertex, Parent vertex and Sibling vertex of E$.$