EMC VNX 5600 add new hard disk to empty slot in the same Disk array enclosure

Hi all,

I have emc vnx5600 and i have empty slots for the new drives. this empty new drives i had inserted the new drives into those empty slots in the same Disk Array Enclusore (DAE). The entire disk has configured to use RAID 5 (4+1) I want to make use of those newly inserted drive. can anyone help me with steps to do this? Much appreciated with your help.