How to enable Lock screen PIN security in Samsung Galaxy Grand 2(SM-G7102)?

a). Tap on Apps as shown below.

b). Now tap on Settings icon and then tap on Device option as shown below.

c). Tap on Lock screen as shown below.

d). Now tap on Screen lock.

e). Tap on PIN security as shown below.

f). Now enter at least 4 digits numeric PIN and then tap on Continue as shown below.

g). Again enter and confirm the same 4 digits numeric PIN and then tap OK as shown below.

h). Lock screen PIN security is now enabled.