помогите, пожалуйста, указать функцию глагола в этих предложениях

1. Why does the company pay great attention to customers relations?

2. The limited supply of energy in some sectors of the US economy is to lead to changes in the economic situation as a whole.

3. She has to inspect the work of the local branch.

4. We have a few problem to discuss today.

5. We are going to increase our exports.