1. A fitness club has a computerised membership system.

The system stores information for each club member: name, home address, email address, mobile phone number, date of birth and exercise preferences.

Many classes are full, and the club creates a waiting list for each class. The club adds details of members who want to join a class that is full to the waiting list for that class.

When the system identifies that a space is available in one of the classes, a new module will send a text message to each member who is on the waiting list.

Decomposition will be used to break the new module into sub‑modules (sub‑problems).

Identify three sub‑modules that could be used in the design and describe their use.

Sub‑module 1 ..........................................................................................................

Use ..........................................................................................................................

Sub‑module 2 .........................................................................................................

Use ..........................................................................................................................

Sub‑module 3 .........................................................................................................

Use ..........................................................................................................................