An independent random sample is selected from an approximately normal population with an unknown standard deviation. Find the p-value for the given sample size and test statistic. Also determine if the null hypothesis would be rejected at α = 0.05. 

(a) n = 11, T = 1.91 

(b) n = 17, T = -3.45 

(c) n = 7, T = 0.83 

(d) n = 28, T = 2.13