In the case above, Ruben  should consider the printing option below:
- Offset litho printing.
- Digital Printing.
- Screen printing.
<h3>What is the best printing type for books?</h3>
The use of digital printing is known to be the best in the case with Ruben. It is said to be much more economical in terms of shorter print runs. 
Note that Digital printing do have fast turnaround time and as such it is better for books.
Therefore, In the case above, Ruben  should consider the printing option below:
- Offset litho printing.
- Digital Printing.
- Screen printing.
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The toolset combination that has the potential to provide the complete end to end solution is Kore.ai, Smart Analytics, IKON, Dynatrace, and Remedy. Dynatrace is a monitoring platform.
The Kore.ai refers to a “no-code” platform used for the design, build, host and deployment of AI-rich assistants.
Dynatrace can be defined as a useful software intelligence platform used to accelerate digital transformation. 
Remedy nowadays represents the Service Management Business Unit of BMC Software.
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Answer:
1. x - 6
2. p - ? = 7
i chose these equations because
a number - 6 = the weight of your backpack.
p - an unknown number without a substitute variable = slices of bread left.
 
        
             
        
        
        
The part of a graphic user interface (GUI) that allows a specific type of interaction with an end user is: D. widget.
<h3>What is a widget?</h3>
A widget is sometimes referred to as a gadget and it can be defined as a software application that is designed and developed as a part (element) of a graphic user interface (GUI) to display specific information or provide an end user with a specific way to interact with the computer's operating system (OS) or program.
<h3>The examples of a widget.</h3>
In Computer science, there are different types of widget and these include the following:
In conclusion, the part of a graphic user interface (GUI) that allows a specific type of interaction with an end user is a widget.
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