What will Ligarius do? Infer why Shakespeare chooses to end this scene in this manner. What does this suggest about Brutus’s importance to the conspiracy?

Ligarius enters, pretending to be sick. He tells Brutus that he could be cured if only Brutus had a noble undertaking in mind. Brutus tells him that he does, and Ligarius pledges to follow Brutus on whatever task he leads him to.I think Shakespeare wants to show that Brutus has decided on his course of action, to kill Caesar, and now has direction.