5 questions regarding databese

there are five questions that i need to answer.

Please check the attached screen shot for the questions.

The paper should be good written ,and not short answers.

Describe the primary differences between the conceptual and logical data models.
2.
What is a candidate key?
3. Describe three types of anomalies that can arise in a table and the negative
consequences of each.
4. Fill in the blanks in each of the following statements:
a. A relation that has no partial functional dependencies is in normal
form.
b. A relation that has no transitive dependencies is in normal form.
A relation that has no multivalued attributes is in normal form.
5. Describe the most common way in which relationships in an E-R diagram are
expressed in a corresponding relational data model.