All corporations that overcharge their customers are unethical businesses. Some unethical businesses are investor-owned utilities.
Therefore, some investor-owned utilities are corporations that overcharge their customers.

Use Venn diagrams to determine whether the following standard-form categorical syllogisms are valid from the Boolean standpoint, valid from the Aristotelian standpoint, or invalid. Then, identify the mood and figure, and cross-check your answers with the tables of valid syllogisms found in Section 5.1.