25 20pts) Use fork/), ereclp (or equivalent), dup2, pipe() and open to execute the shell command "ps grep pat > output" where "output" is the name of a file. Note that your code should execute this specific command only (no parsing). Also you can assume that file "output" already exists. 25 20pts) Use fork/). ereclp (or equivalent), dup2 pipe() and open to execute the shell commande grep pat > Output where output is the name of file. Note that you code should execute this specific command only (no parsing). Also you can assume that file "output" already exists. int main() { nt pid; int f d [2]; pid - fork(); pipe (fd); WRONG L9 voint 1 if (pid == 0) { dup2f in-open ( imput , O. GROND dup 2 (in, 1); dupi (fd0], 1); exico Cups", "ps", 0); else (dup 2 (8 d[o], o]; claseshtrolli