Paraphrase the sentences given below using the infinitive as a part of complex subject.
1.It is known that the manager has already visited the plants of the manufacturer.
2.It is unlikely that they will agree to extend the guarantee period.
3.It is supposed that the customers are to open a L/C for the full value of the goods.
4.One considered that single currency would be a way out.
5.It seems that the manager has already discussed all the issues with the representatives of the seller.