Where and how does Whitman address each of the three stages of loss common to an elegy in "O Captain! My Captain!"?

In the first stanza, the speaker expresses his relief that the ship has reached its home port at last and describes hearing people cheering.

In the second stanza, the speaker implores the Captain to "rise up and hear the bells," wishing the dead man could witness the elation.

In the final stanza, the speaker juxtaposes his feelings of mourning and pride.