1. Enter the read-writer pointer values at the time instants in the following program. You may assume it is executed from the beginning to the end. Assume that the file, "file1.txt", exists and is empty. (40 points) char*buf1[5]; buf1[0]='T'; buf1[1]='K'; buf1[2]='D'; buf1[3]='Y'; buf1[4]='U'; char *buf2[3]; int pread, write fd=open("file1.txt", O_RDWR); (a) nwrite write(fd, buf1, 5); (b) Iseek(fd, (offset t) 2, SEEK_SET); (c) B Dwrite write(fd, buf1, 4); (d) Iseek(fd, (offset t)-5, SEEK_END); (e) Dread read(fd, buf2, 3); (f) = Iseek(fd, (offset t)-4, SEEK_CUR); (g) Dwrite write(fd, buf1, 5); (4) = Iseek(fd, (offset t)-4, SEEK_CUR); awrite-write(fd, buf1, 3); S 2. What would be the contents of the file, "file1.txt", after the above program in problem 1 is completed. Enter a sequence of characters (case sensitive). Do not enter any extra characters such as blank or new-line(Enter). (20 points)