Помогите с заданием!!!
Перепишите следующие предложения, подчеркните в каждом из них глагол-сказуемое и определите его видовременную форму и залог.

1. Scientists have found ways of measuring the sizes and positions of bodies in Universe.
2. The laboratory assistant was writing down all the data during the experiment.
3. The launching of Sputnik 1 was followed by many achievements in science and engineering.
4. Mendeleev was appointed Rector when he was 35 years old.