question: in what year did the turks invade northern cyprus? and so on. well, and then the last question: "how old am i?"
Capitalize this past sentence correctly.
A: In what year did the Turks invade northern Cyprus? And so on. Well, and then the last question: "How old am I?"

question: double hoses in nylon (pa12) or polyurethane (pu).
Capitalize this past sentence correctly.
A: Double hoses in Nylon (PA12) or Polyurethane (PU).

question: he discovered that his memoir géométrie descriptive had been published earlier in 1799.
Capitalize this past sentence correctly.
A: He discovered that his memoir Géométrie descriptive had been published earlier in 1799.