How can an environment variable value be updated? (Choose all that apply.)

Study the following image showing part of the flow within a process:

What problems do you see with the process flow? (select 2 responses)

Consider the following flow within an Object Studio action:

The developer of this flow found that writing some credentials to the target application sometimes failed with an exception even though the element exists on the screen. He found that simply catching the exception, waiting for 2 seconds and then retrying fixed the problem.
What problems do you see within the flow?

Examine the following Process flow:

This is the Main Page of a simple process which calls the 'Calculation' Page before completing.
The data items are configured as follows:
Value-1 is a number data item with an initial value of 100.
Value-2 is a number data item with an initial value of 4.
Result is a number data item with no initial value.
The Calculation Page Reference stage is configured as follows:

The Calculation Page is configured as follows:

The Data Items are configured as follow:
Value-1 is a Number data item with an initial value of 200
Value-2 is a Number data item with an initial value of 4
Result is a Number data item with no initial value
The Start stage is configured to pass through the Value-1 and Value-2 values as input parameters.
The 'Divide' Calculation stage expression is [Value-1] / [Value-2]
The End stage is configured to pass back the value of the Result data item as an output parameter.
What will be contained in the Result data item on the Main Page following the execution of the Process?

What is wrong with the flow shown in the image?