Part B 

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First double-click the series, then choose the "View", "Unit Root Test".
And you will see this:
     
And the testing process are as follows:
1) Level, intercept
   
2) Level, Trend and intercept
   
3) Level, none
   
4) 1st diff, intercept
   
5) 1st diff, Trend and intercept
   
6) 1st diff, none
   
Since the 1st diff exhibit better ADF test statistics, d = 1
 

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