1. logical question- given a 2000 digits number, wich starts with the digit 3, and every two next-to-each-other digits (that are together a decimal number), neads to divide in 17 or 23, what will be the last digit of this numer. 2. write an allocate and free function for a user, while you have 32 rows in the memory to allocate(each allocation gives one avialable row), and 32 bit personal memory to use. 2.1 you have 64 rows in the memory to allocate, and still 32 bit personal memory to use.