After each of the write() calls in the following code segment, explain what the content of the output file would be, and why: fd1 = open("foo", O_RDWR|O_CREATO TRUNC, S_IRUSR | S_IWUSR); fd2 = open("foo", O_RDWR); fd3 = dup(fd2); write(fd1, "abcde", 5); write(fd2, "ABC", 3); write(fd3, "ABC", 3); Iseek(fd2, -3, SEEK_END); write(fd1, "123,", 3)