How to factory data reset tabA 7 lite

[tarun012]

After update of ui 4 I am not doing factory data reset

Reset option is not enable why

[Jameswalter]

Ensure the device is powered off.
Press and hold the. Power / Side. and. Volume Up buttons. 
From the Android Recovery screen, select. Wipe data/factory reset. . Use the Volume buttons to cycle through available options and the Power / Side button to select.
Select. Factory data reset. 
Select. Reboot system now.

Regards,
James

[tarun012]

I tried above setting but there is no option of reset