Измените предложения, используя инфинитивные конструкции:
1. he saw that the solution had changed its colour.
2. it is unlikely that your theory will work in practice.
3. the university installed new equipment in the laboratory so that the researchere could cany out more tests without leaving the faculty.
4. it was reported that the research was showing positive results.
5. it is vital that all the safety rules should be observed during the experiment.​