Referencing Styles : APA Create an ERD for each of the following statements that describe the current business rules for HTH. For each new statement being the business rule, extend the ERD to include the additional business rule in the ERD (created in previous point - for example; B will include A&B, C will include A, B & C, etc.) Use Crows Foot notations and include all of the following in each part: •All entities with Primary key and any foreign key attributes; •The relationships between entities; •The cardinality and optionality of each relationship; •Any M:N relationships are be resolved to 1:M relationships HTH discovered business rules/constraints for your ERD: A.Each tradesperson specialises in only one trade, and details of their trade and the date acquired need to be kept on record. (2 marks) B.Customers call HTH to request a home repair job: Details about the customer and the requested job need to be recorded. (2 marks) C.Each tradesperson may attend to many jobs in their own specialisation. However, since these tradespersons work as contractors, at times they may not be called to any jobs. A job may fit any specialisation. (1.5 marks) D.When the customer describes the work that needs to be done, the customer service person from HTH, assesses the type of work involved and decides whether to send more than one tradesperson on the job to assist each other. This may happen occasionally. (3 marks) E.Make an assumption of your own about a new business rule/constraint, then modify your ERD according to your new assumption. (1.5 mark)