помогите пожалуйста английский Put in the right form of the Passive Voice

1.1 …been examined by the doctor, ( present perfect)

2. Anesthetics … invented in the 19th century. (past simple)

3. More advances are made by the scientists in medicine every year (present continuous) 4 The fact that vitamins could cure many diseases discovered by Kazimierz Funk a Polish scientist. (past simple)​