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The maximum volume of sound output in built'in speakers for computers produced by 3 different PC manufacturers (Dell, HP, IBM) has been compared using 3 different sound cards (for convenience labeled A, B, C). The values in the table represent a score that measures the sound volume in decibels, with higher scores representing greater volume. The researcher has included 5 replications of the data so that there are a total of 5 observations for each combination. The data is found in the Excel le \"Sound Card Excel\" l) Perform a twoway AN OVA using Minitab. 2) Does knowledge of the three computer manufacturers and the three types of sounds cards provide useil information on the variability of sound output? Explain. 5) Now consider the interaction between computer manufacturer and sound card. Perform a hypothesis test for interaction with cc = 0.01. 1) Construct main effects plots and interpret them. 5) Construct interaction plot(s) for the interaction between manufacturer and card. 5) Explain any new information you obtained as a result of examining the interaction plots. Assume that the single most important characteristic for you is the volume of the sound output. 7) Now suppose you have not yet purchased either a PC or a sound card and all choices are available. Again assuming that volume of sound output is your most important criterion, which Manufacturer-Card combination would you buy? What volume would you expect