2. In the following example, assume all system and library calls always complete with no error #define OUTPUT printf("%d ", i) main) { int i-o; OUTPUT; if (fork(O) C i+=2 ; OUTPUT ; else f i++ OUTPUT; return (O); (a) Please write down all possible outputs when running this program. l (b) Add one system call in the pseudo code to ensure that the output values are always in increasing order. [1]