(b) [4 marks] Interpret the coefcient of acs_k3. (c) [4 marks] Test at the .05 level whether or not acs_k3 can be dropped from the model (given the other variables are retained). Clearly state the hypothesis being tested, the test statistic and decision rule being used, and your conclusion. id] [4 marks] Test whether or not there is a regression relation. Clearly state the hypothesis being test, the test statistic and degrees of freedom, and your conclusion