Access control can be considered as the central element of computer security. Question 4(a), 4(b), 4 (c) and 4(d) based on this information.

4 (a). Relate the principal objective of computer security with the function of access control.

4 (b). Briefly explain how access control being implemented in the machine.

4 (c). If Process A requires 500MB of memory space to perform calculation and Process B requires 100MB of memory space to perform graphics processing, identify the object, subject and access operation in this scenario. Provide explanation for your answer.

4 (d). Company RT wants to have different access levels for each of its users. A management level employee will have more privileges to files and operations. The executive level will have moderate privilege to the files but individual users will have their own level of control to the files they own. Which type of access control is suitable for this company and its employee? Clearly explain and justify your answer.

A practitioner orders magnesium sulfate to be infused at 4 g in 20 minutes as a loading dose, followed by a maintenance intravenous infusion of 2 g/hour.

1. Identify the guidelines that must be followed when administering magnesium sulfate intravenous piggy-back.
2. Explain the expected therapeutic effect of magnesium sulfate to the patient.
3. List maternal-fetal assessments that should be done on a regular basis during the infusion of magnesium sulfate.
4. Identify the signs of magnesium sulfate toxicity

please answer all 4 questions. I need brief and correct answers. thank you in advance.

1. Why is it important to mix the solutions after adding the reagents? How is mixing done in this experiment?

2. What is the reason for rinsing the precipitates before further testing?

3. What two things are extremely important to remember when centrifuging?

4. Why is it possible to separate Cu+2 from Al+3 and Fe+3 with NH4OH but not with NaOH? (Hint, consider solubility properties.)

1. An educator believes the average scores on a national statistics quiz are equal for Monday, Tuesday, Wednesday, and Thursday administration days. A random sample of 20 test-takers is collected with the following sample results:

Monday    Tuesday Wednesday Thursday

7 2 7 10

7 4 3    8

9 1 5 8

4   2 9

6 6 7

9 6

Test this hypothesis (by hand) and make sure to show all your work.

Sinclair Fund has invested in securities of five corporations. The market value of each of the investments and the beta of the corporations is as follows:

Stock               Investment                   Beta

1                      $6 million                    0.50

2                      $5 million                    0.80

3                      $4 million                    1.00

4                      $3 million                    1.40    

5                      $2 million                    2.00

The risk free rate is 7 percent and the return on the market portfolio is 12 percent

a)What is the portfolio’s beta coefficient?

b)What is the fund’s required rate of return?

A random sample of ten professional athletes produced the following data. The first row is the number of endorsements the athlete has and the second row is the amount of money made (in millions of dollars) by the athlete.    

what is the y-intercept of ^ and what does it represent?

what is the linear coefficient?

A portfolio generates the following returns over the past 10 years:

Calculate the test statistic to test whether the standard deviation of this portfolio's return is different from the benchmark portfolio standard deviation of 23.

The answer should be 4.075. Please use Excel and show formulas that are used. Thank you!

A bond portfolio named VEX comprises four bonds (face value=$1000):

1) 100 semi-annual bond, 5-year maturity, a coupon rate of 4%

2) 200 annual bonds, 30-year maturity, 8% coupon bond.

3) 300 zero-coupon bonds, 10-year maturity.

4) 400 zero-coupon bonds, 20-year maturity.

2. Given the 6% initial yield, what is the VEX’s duration (use Macaulay’s duration)?

Zippy Cola is studying the effect of its last advertising campaign. People chosen at random were called and asked how many cans of zippy cola they hand bought and advertisements they had either read or seen of zippy cola in the past week Number of ads 3, 7, 4, 2, 0, 4, 1, 2 Cans purchased 11, 18, 9 ,4,7 ,6,3 ,8 what are the independent and dependent variables and also calculate slope and intercept