Please help me answer these with solution and answer, I suck at Statistics. I will give 5 stars for accurate and understandable solution and answer please.

please derive the formulas for confidence intervals for the following parameters, using pivot quantities : Let X1, X2, ..., Xn be a random sample from N(u, oz), where u and of are unknown. Which of the following are pivotal quantities? . Q = X -H o /Vn . Q = X-u s/ Vn . Q = (n-1)s2 . Q = X -M . CI for mu, when sigma is unknown - using the second pivot quantity . CI for sigma^2 - using the third pivot quantity