System level programming

3. Read the following two code fragments, func1(x) and func2(XL., Do func1(x) and func2(x) have same behavior in any circumstances? Give an example of l.fint) to show that func1(x) and func2(x) have the same behavior. If their behaviors are not same in some casesmgive another example of f(int). Explain how these cases affect compilation in program performance optimization? int f(int); int func1(x) { return f(x) + f(x) + f(x) + f(x); } int func2(x) { return 4*f(x); } 4. Read the following code, and answering the questions. LRESULT CALLBACK Wnderec (HWND hund, UINT message, WPARAM WParam, LPARAM Param) { case WM_LBUTTONDOWN: Pos = GET_X_LPARAM(Param); Pos = GET_Y_LPARAM(Param); GetlocalTimel&systime); sprintf(time,"%4d-%20-%2d %2d:%2d", systime.wyear systimewMenth, systimewDay, systime.wHour systime.wMinute, systime.wSecond); hdc = GetDC (wnd); TextQut (odc. XPos, Pos, time, strlen (time)); Release DC (hwnd, hdc); return 0; IEEE } Question 1: What is the function of the code? Question 2: Please add notes to each line of the code