fdisk /dev/sdbType m to read all the fdisk options otherwise at first when prompted for the command, type n (create a new partition), type p (for a primary partition), type 1 (for partition number), type return or 1 (for First cylinder), type return or 512 (Last cylinder), type w (for write the partition) and wait ioctl to re-read the partition table and syncing the disks.

Then execute
fdisk /dev/sdcType n (create a new partition), type p (for a primary partition), type 1 (for partition number), type return or 1 (for First cylinder), type return or 261 (Last cylinder), type w (for write the partition) and wait ioctl to re-read the partition table and syncing the disks.

Then execute
fdisk /dev/sddType n (create a new partition), type p (for a primary partition), type 1 (for partition number), type return or 1 (for First cylinder), type return or 261 (Last cylinder), type w (for write the partition) and wait ioctl to re-read the partition table and syncing the disks.

Then execute
fdisk /dev/sdeType n (create a new partition), type p (for a primary partition), type 1 (for partition number), type return or 1 (for First cylinder), type return or 261 (Last cylinder), type w (for write the partition) and wait ioctl to re-read the partition table and syncing the disks.

If you would like to see your new partitions table type fdisk -l.