A leader has a problem of low Product $x$ sales. She meets individually $($i$.$e$.,$ one at a time$)$ with a number of her subordinates to gain relevant information concerning the problem. But she does not reveal the sales problem to the subordinates or ask them for their opinions$/$advice on how best to solve it$.$ According to Vroom and Yetton's normative theory of leadership, what decision$-$making style is the leader using in this situation?