Answer:
The following are the answer to the given points:
Explanation:
In point (a):
Calculating the long-distance call cost:

Calculating the local call cost:

Calculating the overall cost of PSTN:

In point (b):
Calculating the call rate per second and the average arrival rate:

The call average length:
The complete agent number:

The strength of traffic:
The occupancy of the agent:

Calculation of obtained:

We get = 0.329 to substitute values.
In point (c):
The rate of blocking = 
average call time 

In point (d):
Calculating the number of link, which is required:
In point (e):
Calculating the Line Number:
PSTN line number:

In point (f):
The gross design expense = $ 2309. 5
Inputs to a system that can enhance performance is called Resources
Answer:
D) A rendering engine displays content on the screen and a browser engine coordinates user interface interactions.
Explanation:
The rendering engine will deal with all the HTML code and will generate an output based on its own rules for interpreting the code. That's why different rendering engines will have different renditions of the same given HTML code. You can notice that in the acceptance of HTML5 and CSS3 tags, which are not universal yet.
The browser engine will deal with the user interface and all other features that make a browser a browser, relying on the rendering engine for the display.
That duality allows different browsers to use the same rendering engine, thus have similar outputs.
Answer:
B
Explanation:
Computer security, cybersecurity or information technology security (IT security) is the protection of computer systems and networks from information disclosure, theft of or damage to their hardware, software, or electronic data, as well as from the disruption or misdirection of the services they provide.[1]