Determine the upper-tail critical values of $\mathrm{F}$ in each of the following two-tail tests. a. $\alpha=0.02, \mathrm{n}_{1}=31, \mathrm{n}_{2}=21$ b. $\alpha=0.01, \mathrm{n}_{1}=31, \mathrm{n}_{2}=21$ c. $\alpha=0.05, \mathrm{n}_{1}=31, \mathrm{n}_{2}=21$ a. The critical value of $F$ when $\alpha=0.02, n_{1}=31, n_{2}=21$ is (Round to two decimal places as needed.) SP.VS.857