Help!!!!! Urgent and I can't figure it out

A Financial analyst: wanted to determine the mean annual return on mutual funds . In a random sample of 150 returns, she found a mean of 12.9% If we assume that the population Standard deviation is 3 %%, estimate with 90 confidence: the mean annual return on all mutual funds. - Average percent return? - upper confidence limit of X ? - lower confidence limit of X ? - Z value for upper confidence limit ? - I value for lower confidence limit? . - confidence coefficient valve? - Aloha value