I. The minimum spanning tree $($MST$)$ formed from G is unique. FALSE. The minimum spanning tree $($MST$)$ formed from G is not necessarily unique. If there are multiple edges with the same minimum weight, different MSTs can be formed by including different combinations of these edges.II$.$ The MST of G must contain $!.$ TRUE. The MST of G must contain the edge with the minimum weight $(!).$ This is because the MST is formed by including the edges with the minimum total weight that connect all the vertices in the graph. Since the edge $!$ has the minimum weight, it must be included in the MST$.$III. The MST of G must not contain $".$ FALSE. The MST of G can contain the edge $"$ or any other edge with a weight greater than the minimum weight. The MST is formed by including the edges with the minimum total weight that connect all the vertices in the graph. If the edge $"$ or any other edge with a greater weight is necessary to connect all the vertices, it will be included in the MST