How to manage Call answering/ending settings in Samsung Galaxy Grand2(SM-G7102)?

a). Tap on Apps icon as shown below.

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

c). Tap on Accessibility option as shown below.

d). Now, tap on the Answering/ending calls option.

e). Now tap on the Check box next to The home key answers calls option to enable it.

f). Now, tap on the Check box next to Voice control to enable, as shown below.

g). Now, tap and drag the switch to enable Voice control commands.

h). Now, tap on the Check box next to The power key ends calls option as shown below.