Using the triangle method, show graphically that

(a) \(\overrightarrow{\mathbf{A}}+\overrightarrow{\mathbf{B}}=\overrightarrow{\mathbf{B}}+\overrightarrow{\mathbf{A}}\) and

(b) if \(\overrightarrow{\mathbf{A}}-\overrightarrow{\mathbf{B}}=\overrightarrow{\mathbf{C}}\), then \(\overrightarrow{\mathbf{A}}=\overrightarrow{\mathbf{B}}+\overrightarrow{\mathbf{C}}\).