Leonardo da Vinci made first sketches of submarines in the late 1400s

In 1890s people built the first real submarine

Today countries spend billions of dollars on building submarines

Задание - Paraphrase each sentence using the Passive so that it means the same as the original sentence.( 6 points max.)

Ни черта если честно не знаю просто помогите кто не тупой в английском