In C++, what is the answer to this question:

Assume you have a method called processLines (std::istream& is, std::ostream& os) that process line-by-line. Complete the main method below to call processLines method to process the 3 lines: "Line #1", "Second Line", and "Last line". The output should be written to standard console output stream. (Hint: Use a std: :istringstream) /7 Prototype declaration void processLines(std::istream& is, std::ostream& os); int main) (