Из данных предложений выпишите те, сказуемое которых стоит в страдательном залоге (Passive Voice); подчеркните в них сказуемое

l. Economical statistics achieved great success last year. — Great
success was achieved by economical statistics last year.
2. People apply mathematical methods in many branches of modern science.
— Mathematical methods are applied by people in many branches of
modern science.
3. Economists will calculate the cost of production.
—The cost of production will be calculated by economists.