Помогите определить типы предложений (АНГЛИЙСКИЙ)

1. We should not solve this problem if we had no plastics with some unique properties.

2. He asked them, if they had applied a digital computer in solving the problem.

3. If 1 were a designer of cars I should think of more extensive application of plastics for finishes.

4. If he is an excellent specialist we shall ask his advice.

5. If I were acquainted with this famous professor I should ring him up.

6. You will be free tomorrow if you finish this work in time.