Consider the following requirements when answering Questions 1 and 2: OntarioTech IT Sales & Services database: Your task is to design an Entity-Relationship diagram and its relational schema for the company's database, which includes computer sales and service tickets. Your ER diagram must reflect the requirements/specifications and business rules given below: An IT sales representative may sell many computers, however a computer is sold by only one representative: A representative writes an invoice for each computer sold; A customer may purchase any number of computers, but each computer is purchased by a single customer; . A customer receives an invoice for each computer purchased; A customer may not come to OntarioTech to purchase a computer, but to have a computer repaired instead; . If a customer brings one or more computers in for repair, a repair/service ticket is generated/written for each computer; OntarioTech keeps a record or service history for each of the computers repaired. Repair tickets are referenced by the computer's serial number; A computer brought in for repair can be serviced by many technicians, and each technician may work on multiple computers; A computer repair may require computer parts (e.g. memory, GPU, mainboard, harddrive, etc.) or just a software refresh or something that does not require any parts: Computer parts should be kept in the database even if they are not used in a repair. . A service has an associated hourly rate. Consider the following requirements when answering Questions 1 and 2: OntarioTech IT Sales & Services database: Your task is to design an Entity-Relationship diagram and its relational schema for the company's database, which includes computer sales and service tickets. Your ER diagram must reflect the requirements/specifications and business rules given below: An IT sales representative may sell many computers, however a computer is sold by only one representative: A representative writes an invoice for each computer sold; A customer may purchase any number of computers, but each computer is purchased by a single customer; . A customer receives an invoice for each computer purchased; A customer may not come to OntarioTech to purchase a computer, but to have a computer repaired instead; . If a customer brings one or more computers in for repair, a repair/service ticket is generated/written for each computer; OntarioTech keeps a record or service history for each of the computers repaired. Repair tickets are referenced by the computer's serial number; A computer brought in for repair can be serviced by many technicians, and each technician may work on multiple computers; A computer repair may require computer parts (e.g. memory, GPU, mainboard, harddrive, etc.) or just a software refresh or something that does not require any parts: Computer parts should be kept in the database even if they are not used in a repair. . A service has an associated hourly rate.