Popular auto companies play dominant role in the share market. In 2020, the market share of Toyota was 40%, Honda was 30% and other competitors accounted for 30%. Suppose that a new survey of 200 newcar customers in 2021 shows the following purchase frequencies: Auto Frequencies Toyota 100 Honda 80 Others 20 (a) Show that it is appropriate to carry out a chisquare test using these data. (b) Test to determine whether the 2021 market shares differ from those of 2020 using critical value approach. Use or : 0.05 and Show detailed calculation (hypotheses, observed frequencies, expected frequencies, chi-square test statistic, degrees of freedom, critical value) for reaching decision