Next to each marked statement of the program given below, specify the offset on the corre sponding file after the statement is carried out successfully. void main() \{ char buf [100]; int fd1 = open("file1.txt", O_RDWR | O_CREAT, S_IRUSR I S_IWUSR); int fd2 = open("file2.txt", O_RDWR | O_CREAT, S_IRUSR I S_IWUSR); strcpy(buf, "12345678901234567890"); write(fd2, buf, 20); write(fd1, buf, 15); lseek(fd1, 5, SEEK_SET); read(fd1, buf, 10); lseek(fd2, -5, SEEK_END); lseek(fd1, -5, SEEK_CUR); //be careful here, what does buf contain? write(fd2, buf, strlen(buf)); \} void main(){ char buf [100]; int fd1 = open("file1.txt", O_RDWR | O_CREAT, S_IRUSR | S_IWUSR); int fd2 = open("file2.txt", O_RDWR | O_CREAT, S_IRUSR | S_IWUSR); strcpy(buf, "12345678901234567890"); write(fd2, buf, 20); write(fd1, buf, 15); lseek(fd1, 5, SEEK_SET); read(fd1, buf, 10); lseek(fd2, -5, SEEK_END); lseek(fd1, -5, SEEK_CUR); //be careful here, what does buf contain? write(fd2, buf, strlen(buf)); \}