2.1 Deliverable 1 (30 pts) A detailed, conceptual design using the E-R model should be included, showing the entities, attributes, relationships with cardinalities and integrity constraints. You may use either the text book notation or the crow's foot notation (see the links for a tool below). If you are using the text book notation, you may use MS Visio (available in the labs) or draw by hand, neatly and legibly. If it is not clear, it will not be graded. Or you may choose to use any diagramming tool of your choice (5 pts extra), but a detailed legend to identify the notation used, should be included