The sample variance of a random sample of the weekly income of 50 CSULB student was found to be S^2=80(S^2=sample variance)

A) can we infer at the 1% significance level that population variance Q^2 is less than 100?

B) estimate with 95% confidence thevarianve of the weekly income of CSULB students (Make-sure to not confuse the confidence level of part with significance level of part a).

Can you please do the problem step by step and explain the logic behind each step. Can you also provide me with the graphs for the problem and explain why are they right or left tailed.