Solution:and I’.
When a noun (or pronoun) is used as the Subject of a verb, it is said to be in the Nominative Case and when it is used as the Object of a verb, it is said to be in the Objective (or Accusative) case. In the sentence given, the staff and the person speaking form the subject of the verb ‘were’ and hence the Nominative Case of the First Person-Singular i.e. ‘I’ should be used instead of the Accusative Case i.e. ‘me’.
Note- To find the Nominative Case put Who? or What? before the verb.
To find the Accusative Case put whom? or What? Before the verb and its subject. For e.g. Hari broke the window. (Object). The window was broken. (Subject)
The Nominative generally comes before the verb and the Accusative after the verb. Hence they are distinguished by the order of words, or by the sense.