total number of hard disks that you have is around $8$ nos of $400$gb pet hard disk $.$explain with calculation and reason of how much of usable disk capacity would you get in following configurationa$)$ RAID $0$ with all $8$ hard disks.b$)$ RAID $1$ with $6$ hard disks.c$)$ RAID $5$ with $6$ hard disks and $2$ hot spares.d$)$ RAID $6$ with $7$ hard disks.