This exercise asks you to convert business statements into dependencies. Consider the relation DISK_DRIVE (Serial_number, Manufacturer, Model, Batch, Capacity Retailer). Each tuple in the relation DISK_DRIVE contains information about a disk drive with a unique Serial_number, made by a manufacturer, with a particular model number, released in a certain batch, which has a certain storage capacity and is sold by a certain retailer. For example, the tuple Disk_drive ('1978619', 'WesternDigital', 'A2235X', '765234', 500, 'CompUSA') specifies that WesternDigital made a disk drive with serial number 1978619 and model number A2235X, released in batch 765234: is 500GB and sold by CompUSA. Write each of the following dependencies as an FD: a) The manufacturer and serial number uniquely identifies the drive. b) A model number is registered by a manufacturer and therefore can't be used by another manufacturer. c) All disk drives in a particular batch are the same model. d) All disk drives of a certain model of a particular manufacturer have exactly the same capacity. This exercise asks you to convert business statements into dependencies. Consider the relation DISK_DRIVE (Serial_number, Manufacturer, Model, Batch, Capacity Retailer). Each tuple in the relation DISK_DRIVE contains information about a disk drive with a unique Serial_number, made by a manufacturer, with a particular model number, released in a certain batch, which has a certain storage capacity and is sold by a certain retailer. For example, the tuple Disk_drive ('1978619', 'WesternDigital', 'A2235X', '765234', 500, 'CompUSA') specifies that WesternDigital made a disk drive with serial number 1978619 and model number A2235X, released in batch 765234: is 500GB and sold by CompUSA. Write each of the following dependencies as an FD: a) The manufacturer and serial number uniquely identifies the drive. b) A model number is registered by a manufacturer and therefore can't be used by another manufacturer. c) All disk drives in a particular batch are the same model. d) All disk drives of a certain model of a particular manufacturer have exactly the same capacity