Consider the following program (includes not shown). filel only contains the letter z int main(void) { printf("X"); flush(stdout); fork(); printf("Y"); flush(stdout); execlp("cat", "cat", "file1",...

Extracted text: Consider the following program (includes not shown). filel only contains the letter z int main(void) { printf("X"); flush(stdout); fork(); printf("Y"); flush(stdout); execlp("cat", "cat", "file1", (char*) NULL); printf("W"); fflush(stdout); sleep(3); return e; If nothing gets printed enter nothing What is printed to the terminal screen by this program? How many processess are sleeping after all letters have been printed?