Answer: Extra Vacation ; Stay
Step-by-step explanation:
At the Nash equilibrium, Deloitte will choose extra vacation and Malik will respond with stay.
A Nash Equilibrium is the optimal outcome for each player given the decisions of the other player.
Looking at the the sequential game tree, if Deloitte offered a Money Bonus, Malik would leave because it offers him a higher payout. Deloitte would not want this because they gain more when he stays.
If Malik is offered extra vacation however, Malik stands to gain more than every other option if he stays and Deloitte would therefore offer him this because it will still be a gain for them. This is the Nash equilibrium.