4. (10%) A die was cast $n = 120$ independent times and the following data resulted: | Spots up | 1 | 2 | 3 | 4 | 5 | 6 | | --- | --- | --- | --- | --- | --- | --- | | Frequency | b | 20 | 20 | 20 | 20 | 40-b | 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? (^2(5),α=0.025 = 12.8; ^2(6),α=0.025 = 14.4; ^2(5),α=0.05 = 11.1; ^2(6),α=0.05 = 12.6)