The following question has to be resolved using software requirement analysis (AKA requirement engineering, is the process of defining user expectations for a new software being built or modified)

Question)

Make a friend of yours as the client. Perform structured analysis and object- oriented analysis for the following:

(a) An electronic mail system

(b) A simple student registration system.

(c) A system to analyze a person's diet.

(d) A system to manage recipes for a household.

(c) A system to fill tux forms for the current year tax laws.

The teacher was very vague in providing the details and this is the whole question. They require the use of SRS (software requirement specification) methods to solve this. Please help.