Three varieties of potatoes are being compared for yield. The experiment is conducted by assigning each variety at random to one of 3 equal-size plots at each of 4 different locations. The following yields for varieties A, B, and C, in 100 kilograms per plot, were recorded: Location 1 Location 2 Location 3 Location 4 B : 13 A: 18 C : 12 C : 21 A: 20 B : 23 C : 9 B : 12 A: 14 A: 11 C : 10 B : 17 Perform a randomized complete block analysis of variance to test the hypothesis that there is no difference in the yielding capabilities of the 3 varieties of potatoes. Use a 0.05 level of significance. Draw conclusions.