Sections a (9 points) The Amazon mobile app allows customers to set up pet profiles for all of the themeyne goldfish, hamsters, dogs, or horses. This allows Amazon to offer its customers targeted promotions based on the types of pets that they have. Each pet type (e.g., dog, cat) may be associated with zero or more specific brenda and each breed stored in the Amazon database will correspond to exactly one pet typel. b. (9 points) A hospital stores data about its nurses and their relationships to nursing stations in the hospital Although nurses are related to nursing stations in several ways, we are interested here in determining which nurse is designated as the primary administrator of specific nursing stations. By policy, a nurse can only oversee a maximum of one nursing station. Each nursing station, likewise, can only have one primary administrator. All nursing stations must also have at least one primary administrator. Of course, many of the nurses in the database are not administrators at all. C. (9 points) The College of Business PhD Subcommittee is currently working to revise the "college core" courses that all PhD students must take, regardless of their concentration. As part of that effort, subcommittee members must pay careful attention to course sequencing, which includes specifying course prerequisites that ensure adequate preparation before taking higher level courses, while still allowing students adequate scheduling flexibility. All suggested changes must be approved by the university before they can be incorporated into the next course catalog. The catalog entry for a particular course may list zero or more other courses as prerequisites. Further, a course may be designated by zero or more other courses as being a prerequisite itself. Sections a (9 points) The Amazon mobile app allows customers to set up pet profiles for all of the themeyne goldfish, hamsters, dogs, or horses. This allows Amazon to offer its customers targeted promotions based on the types of pets that they have. Each pet type (e.g., dog, cat) may be associated with zero or more specific brenda and each breed stored in the Amazon database will correspond to exactly one pet typel. b. (9 points) A hospital stores data about its nurses and their relationships to nursing stations in the hospital Although nurses are related to nursing stations in several ways, we are interested here in determining which nurse is designated as the primary administrator of specific nursing stations. By policy, a nurse can only oversee a maximum of one nursing station. Each nursing station, likewise, can only have one primary administrator. All nursing stations must also have at least one primary administrator. Of course, many of the nurses in the database are not administrators at all. C. (9 points) The College of Business PhD Subcommittee is currently working to revise the "college core" courses that all PhD students must take, regardless of their concentration. As part of that effort, subcommittee members must pay careful attention to course sequencing, which includes specifying course prerequisites that ensure adequate preparation before taking higher level courses, while still allowing students adequate scheduling flexibility. All suggested changes must be approved by the university before they can be incorporated into the next course catalog. The catalog entry for a particular course may list zero or more other courses as prerequisites. Further, a course may be designated by zero or more other courses as being a prerequisite itself