b. Test at level .05 the null hypothesis HOAB: all y's = 0 (no interaction of factors) against HAB: at least one Yi; + 0. c. Test at level .05 the null hypothesis HOA: a₁ = α₂ = aA a3 = 0 (factor A main effects are absent) against HA least one a; + 0. d. Test HOB: B₁ = ß₂ = ẞ3 = ß₁ = 0 versus HB: at least one B; 0 using a level .05 test. e. The values of the 's the 's were ₁.. = 4010.88, X2.. =4029.10, and .. = 3960.02. Use Tukey's proce- dure to investigate significant differences among the three curing times. HOAB: all Yij's = 0 # Yij * 0. Н aA α = 0. HOB B₁ =B2B₁ = ẞ₁ = 0 β ẞ3 Ha aB