A Complete-Block Design Is Being Used to Test the Null $S S(T r)=60, S S B=90, S S T=200$

Essay

A complete-block design is being used to test the null hypothesis that mean responses are identical under four treatments, with three levels used for the blocking factor.
The following data are obtained: $S S(T r)=60, S S B=90, S S T=200$ .
a. Construct the ANOVA table.
b. Should the null hypothesis of identical population means be rejected at the $\alpha=0.05$ significance level.