Укажите, в каких функциях употреблен глагол to have в следующих предложениях:
1). Не often has to write letters to foreign companies.

2). They have already discussed the time of delivery of goods.

3). The firm has extended its resources through the use of credit.

4). They had to agree to this plan.

5). The owner has invested some of his money into new businesses.

6). The firm has no securities.

7). New credits have increased the income of the purchaser.