4. (10%) A die was cast $n = 120$ independent times and the following data resulted:

If we use a chi-square test, for what values of b would the hypothesis that the die is unbiased be rejected at the 0.025 significance level? (\( \chi^2_{(5),\alpha=0.025} = 12.8 \); \( \chi^2_{(6),\alpha=0.025} = 14.4 \); \( \chi^2_{(5),\alpha=0.05} = 11.1 \); \( \chi^2_{(6),\alpha=0.05} = 12.6 \))