Excel Vlookup function doubt.

Hey team,
I hope you are keeping well, I was using vlookup function to get the value of t statistic using degree of freedom and value of alpha, however I am facing #N/A error.
When I worked on the same I found that match function requires a perfect value, to find the reference and gives a NA error when I insert a formulae.

I have attached the excel file pls help me with the same.
Kind Regards
Yuvraj.

Link: https://drive.google.com/uc?id=1o9-IRJJvAq6v61LREKmrMMSnvNReLHKW