We store 8 data blocks (A1, A2, .. A8) in three different storage architectures: (1) In a single disk (2) In RAID 0 using two disks (3) In RAID 1 using two disks Suppose reading one block from the disk to the memory takes 1ms, and writing one block from memory to disk takes 1ms as well. What is the time needed to read/write A1,A2,A3, and A4 under each of the three storage architecture