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 tupleDisk$\_$drive$(1978619,$WesternDigital$,$A$2235$X$,765234,500,$CompUSA$)$specifies that WesternDigital made a disk drive with serial number $1978619$and model number A$2235$X$,$ released in batch $765234$; it is $500$GB and sold by CompUSA. Write each of the following dependencies as an FD: i$)$ The manufacturer and serial number uniquely identify the drive. ii$)$ A model number is registered by a manufacturer and therefore can$$t be used by another manufacturer. iii$)$ All disk drives in a particular batch are the same model. iv$)$ All disk drives of a certain model of a particular manufacturer have exactly the same capacity.