Solaris Powerpath Configuration

Hi Guys,

Need to ask a couple of questions
AVAILABLE DISK SELECTIONS:
0. c0t0d0
/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@0,0
1. c0t1d0
/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@1,0
2. c1t5006016841E01644d0
/pci@1,700000/SUNW,qlc@0/fp@0,0/ssd@w5006016841e01644,0
3. c3t5006016141E01644d0
/pci@3,700000/SUNW,qlc@0/fp@0,0/ssd@w5006016141e01644,0
4. c3t5006016941E01644d0
/pci@3,700000/SUNW,qlc@0/fp@0,0/ssd@w5006016941e01644,0
5. emcpower0a
/pseudo/emcp@0
Specify disk (enter its number)[3]: ^D

a) From input above, how do i know powerpath is working?
b) Does it mean that disk 2,3 and 4 is actually the same LUN assigned to this server?
c) What is the function of disk 5?