For questions 1 4, compare the efficiency of using sequential search on an ordered table of size n and an unordered table of the same size for the key Item: 1. If no record with the key Item is present 2. If one record with the key Item is present and only one is sought. 3. If more than one record with the key Item is present and it is desired to find only the first 4. If more than one record with the key Item is present and it is desired to find them all.