If the speaker refers to a single group. One or both of the whole group of them as a single unit. Do not have a separate list of people or individual. The verb must have a singular (Singular Verb)
If the speaker refers to a group of one or both of the entire group as a single unit. Not on a per person or individual to use the singular verb (Singular Verb).
If the speaker refers to a single group of one or both the faculty, as a single unit, not separate each individual verb or to use the singular. (Singular Verb).