Wouldn't the subject be I because it is about you?
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<span>Macbeth's footsteps must be stealthy. Stealthy means an act of being cautious for the person's act to be not seen or heard by someone else. In the sentence, Macbeth wanted to walk without waking anyone in the castle so he must be stealthy in his action.</span>
You example them as an ‘immigrant’ because an immigrant is someone who comes from another country and moves to a different country.
