Answer:
The broad responsibility of a UX designer is to ensure that the product logically flows from one step to the next. One way that a UX designer might do this is by conducting in-person user tests to observe one’s behavior.
Explanation: I don't know if this is what your looking for though.
Answer:
Great!
Explanation:
I use mobile phone and i use it as exmergency phone
Answer:
Hide command suppresses the visibility of a particular row or column in a worksheet
Explanation:
Hide command is used to hide the row or column in an excel worksheet. To suppress the visibility of a particular row or column in a worksheet, you have to select that particular row or column and then right-click on column or row header. A popup screen will appear as like when you refresh the computer. Then on this screen, at the bottom, you will find the hide command, click the hide command. And, as you click the hide command that particular row or column will become invisible. if you want to show it again, click the Unhide command. Therefore, hide command suppresses the visibility of a particular row or column.
Why other options are not correct
Autofit
Autofit command is used when you want that a particular cell of row or column to automatically adjust / or accommodate the content. Autofit command does not affect the visibility of a row or column.
Insert
Insert command is used to insert contents in a particular worksheet. Insert command is based on groups of various commands such as inserting tables, charts, graphs, text, symbols, add-ins, sparklines, and links.
Replace
Replace command is used in excel to replace the text with some other text. If you want to replace some text with some other text, then you have to use the replace command.
Answer And explanation
a)
has 1/ probability guess the correct source
b)
Each element in 
is mapped by / . There are 
So there are -1 elements.
number of target elements =
number of source elements = -1
probability = -1 /
c) Probability of the correct target element
1/
