a) describes the issue/story (Clearly identify which case you are using, 

b) explains why it has ethical implications (Why is this an ethics issue?  And What sorts of ethical implications may it have/has it had?)

c) describes egoism (ethical theory) - Part of this task involves using theory to determine whether  the actual actions of the relevant parties were ethical OR discussing what actions the parties should have taken . If you choose to do the former, use egoism to assess the actions, a description of the relevant ethical theory is required. More marks are awarded for describing the theory in your own words to show that you understand, rather than merely reiterating what is in the text book.

d) applies egoism to the case in order to assess whether the actions of the participants are ethical OR describe what the participants should have done to your resolution to assess whether it is ethical. (The majority of the marks awarded in this subject are for your application and understanding of ethical theory.  E.g. An application of egoism requires you to discuss all the positive and negative consequences  for the relevant person/organisation and then weigh these up rather than merely stating "They were following their long-term interests so were applying egoism"  Such a statement  not only fails to provide evidence of your mastery of relevant concepts, it shows a fundamental lack of understanding of ethical theory.