Из данных предложений выпишите те, сказуемое которых стоит в страдательном задатке

Из данных предложений выпишите те, сказуемое которых стоит в страдательном закладе (Passive Voice); подчеркните в их 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.