Please solve this database problem as soon as possible.

12 5.a) Draw the symbols used in an E-R diagram for the following cases: i) Weak Entity Set ii) Multi Valued Attribute iii) Total Participation iv) Derived Attribute b) Analyze the following ER-Diagram and draw the corresponding relational schema for the following ER diagram: 13 Since ID d.o.birth Age 1 Company Work M Staff Name M M Address Phone Has Task Perform M 1 Wife Married Child Description Name Name