Decide whether you would reject or fail to reject the null hypothesis in thefollowing situations:a. ???????? = 3.50, sD = 1.10, n = 12, = 0.05, two-tailed testb. 95% ???????? = (0.20, 1.85)c. t = 2.98, t* = -2.36, one-tailed test to the leftd. 90% CI = (-1.12, 4.36)