Quant- degrees of freedom table

This might be a dumb question, but how do we get the t critical values from the degrees if freedom table in appendix c in the cfa textbook. It says values for x2 and probabilities with level of significance in right tail. The table from level 1 is simpler. Pls someone explain

Such kind of data is either given along with the question or you can find in the CFAI textbooks only . Try once more.