I need to create a normalized ER diagram, but I'm having so many problems to understand normalization.
The company Food and Cia delivers meals in the delivery system and wants an information system to better organize your business. Clients make orders by discriminating one or more menu items and their respective quantities (for example, John makes a request to receive 2 lasagnes, 1 filet with fries and 3 cans of beer at home). From a customer you want to know: name, address, telephone number and reference point. Menu items can be of three types: meals, desserts and drinks. Customers inform on request whether it is for delivery or not.
I have no idea how to solve it, someone may help me, please?