Answer:
Me (I)
Io devo studiare per l'esame. (I have to study for the exam.)
Friend/Colleague/Professor (He/She)
Il mio amico deve preparare la presentazione. (My friend has to prepare the presentation.)
More Friends/Colleagues/Professors (They) - Plural
I miei amici devono partecipare alla riunione. (My friends have to attend the meeting.)
Step-by-step explanation: