Consider a computer system with three users: alice, bob, candy. alice owns the file alicerc, and bob and cyndy can read it. cyndy can read and write the file bobrc, which bob owns, but alice can only read it. only cyndy can read and write the cile cyndyrc, which she owns. assume that the owner of each of these files can execute it.
a. create the corresponding access control matrix.
b. cyndy gives alice permission to read cyndyrc, and alice removes bob's ability to read alicerc. show the new access control matrix.

Write a select statement that returns product name, customer first name, customer last name, channel description, and amount sold for all the sales. make sure to returns sales even if there is no information on the customer, product, or channe

Me2540 week 5 assignment what do i want to know?

Researchers measured the data speeds for a particular smartphone carrier at 50 airports. the highest speed measured was 78.1 mbps. the complete list of 50 data speeds has a mean of x overbarequals16.11 mbps and a standard deviation of sequals18.65 mbps. a. what is the difference between carrier's highest data speed and the mean of all 50 data speeds? b. how many standard deviations is that [the difference found in part (a)]? c. convert the carrier's highest data speed to a z score. d. if we consider data speeds that convert to z scores between minus2 and 2 to be neither significantly low nor significantly high, is the carrier's highest data speed significant? a. the difference is nothing mbps.