Are 2 observations for each treatment combination in Exercise 14.16 sufficient if the power of our test for detecting differences among the levels of factor C at the 0.05 level of significance is to be at least 0.8 when γ₁ = —0.2, γ₂ = —0.4, and γ₃ = —0.2? Use the same pooled estimate of a² that was used in the analysis of variance.