Here’s the full markdown version of your provided images: --- ### (a) Adjacency List Representation **Graph:** Vertices: a, b, c, d **Adjacency List:** | Vertex | Adjacent Vertices | | :----: | :---------------: | | a | c | | b | d | | c | b, d | | d | b | --- ### (b) Adjacency Matrix Representation **Graph:** Vertices: a, b, c, d **Adjacency Matrix:** [ M_b = \begin{pmatrix} & a & b & c & d \ a & 0 & 1 & 0 & 1 \ b & 1 & 0 & 1 & 1 \ c & 0 & 1 & 0 & 1 \ d & 1 & 1 & 1 & 0 \end{pmatrix} ] --- ### (c) Adjacency Matrix Representation **Graph:** Vertices: a, b, c, d **Adjacency Matrix:** [ M_c = \begin{pmatrix} & a & b & c & d \ a & 1 & 0 & 1 & 1 \ b & 0 & 1 & 0 & 1 \ c & 1 & 1 & 1 & 0 \ d & 0 & 1 & 0 & 1 \end{pmatrix} ] --- 注意使用 mathtex 显示公式 中文输出