Draw a simple ERD diagram for each of the following examples. Include proper maximum and minimum cardinality. Include one attribute besides keys. 1. Sandy’s Car Lot has several salesmen who sell a variety of used automobiles to customers. When sold, each auto is credited (sold by) to only one salesperson. A customer may buy more than one automobile, but an automobile, if sold, is sold to only one customer.
2. The National Park Service has almost three hundred parks and monuments and other areas (like National Historical Sites, National Memorials, etc.). These areas are located and administered through twelve territories (each area is in one and only one territory). Each park service area has several staff that work there; a staff member may work in more than one area. Thus, staff employees who work at Arches National Park in Utah may also work at Canyonlands National Park nearby.
3. A zoo wants to keep track of animal types (bobcat, tiger, elephant, etc.) and where they are caged. This is a special zoo. Each animal type has its own cage by itself, and a cage may have only one animal type.

which functions return a valid value without any arguments?

(-blank- and -blank- return a valid value without any arguments.)

1st -blank-

today

sqrt

count

2nd -blank-

round

now

sqrt

a  social news website  is an  internet  website  that features  user-posted stories. such stories are ranked based on popularity, as voted on by other users of the site or by website administrators. users typically comment online on the news posts and these comments may also be ranked in popularity. since their emergence with the birth of  web 2.0, social news sites have been used to link many types of information, including news, humor, support, and discussion. all such websites allow the users to submit content and each site differs in how the content is moderated. on the  slashdot  and  fark  websites,  administrators  decide which articles are selected for the front page. on  reddit  and  digg, the articles that get the most votes from the community of users will make it to the front page. many social news websites also feature an online comment system, where users discuss the issues raised in an article. some of these sites have also applied their voting system to the comments, so that the most popular comments are displayed first. some social news websites also have a  social networking  function, in that users can set up a user profile and follow other users' online activity on the website.