Определите в предложениях видоизмененную форму и залог глагола сказуемого 1. а) Farmers will have finished the experiment

1. Farmers will have finished the experiment by September. Future Perfect Active Voice. 2. The agronomist is looking for the new method of pest control.  Present Continuous Active Voice. 3. The extent of the root system area is influenced by the structure of the soil. Present Simple Passive Voice. 4. The leaves of this plant as well as its stems are used as feed for animals. Present Simple Passive Voice.