Tab key press in bxSlider 4.2.5

Currently we are using bxslider(4.2.5) in our application where as per our requirement, we need to invoke the next slide on tab key press.Currently we are able to do show using left arrow and right arrow key by enabling the keyboardEnabled: true.However we want that on pressing the tab key, the next slide should appear while pressing the Shift+Tab key combination, previous slide should appear in the bxslider.

Kindly help.