Rewrite the sentences using passive voice(пассивный стан) 1)they received a patent for the invention of this medicine fifteen years ago. 2)who discovered the penicillin? 3)they are untrodusing new software now.

1) A patient for the invention of this medicine was received by them fifteen years ago.
2) Who was the penicillin descovered by?
3) New software are being intodusted now.