Graph (D, x ightarrow v ightarrow w ightarrow x ightarrow y ightarrow z ightarrow x ightarrow t

Graph \(D, x \rightarrow v \rightarrow w \rightarrow x \rightarrow y \rightarrow z \rightarrow x \rightarrow t \rightarrow r \rightarrow s \rightarrow t \rightarrow u \rightarrow v \rightarrow t\)

Use the figure to answer the following exercises. In each exercise, a graph and a sequence of vertices are given. Determine whether each sequence of vertices is an Euler trail, an Euler circuit, or neither for the graph. If it is neither, explain why.

u Graph A X Graph B W W Graph C Graph D y W