Consider a system that the users are:

Individual customers who use the Business$-$to$-$Customer $($B$2$C$)$ module of the system to purchase a product.

Employees who use the Intranet module to manage internal business operations.

The B$2$C module of the system should enable the individual consumers to do the following:

Create a user account.

Edit user account.

Browse products by category: the categories include: mobile app, online games, music, and online books.

Personalise level of service access by choosing type of service $($gold$,$ silver, or bronze$)$ and based on period of subscription $($one month, six months or one year$).$

Personalise level of service support by choosing between $24/7$ customer service or limited customer service.

Pay online via PayPal, credit card, or BPAY.

Provide feedback on the service via star$-$rating and via a comment section.

Search $$purchase history$$ in the last $7$ days, last $30$ days, or last $6$ months.

Use a chatbot $($to receive personalised service support$).$

Interact with the business via social media.

Track orders directly via the website or indirectly by connecting to post office.

The intranet module of the system should enable the employees to:

Generate monthly, six$-$month and annual income and cost reports.

Generate monthly, six$-$month and annual tax reports.

Interact with customers via social media.

Update the product information.

Integrate the chatbot with new business processes.

Design both:

$-$ Requirements matrix;

$-$ Fundamental modelling concepts $($FMC$)$ diagram