Hello, I need the solution to this problem and for someone to tell me what formulas to use for each part eg formula ___ for a) with the right numbers in it. Thank you

(Use this page - front and back - to answer) [value= 8 points] Ruby Gem is the owner of two jewellery stores located in Los Angeles and San Francisco. During the past year the San Francisco store had spent a considerable amount on in-store displays as compared to the Los Angeles store. Ruby Gem wants to determine if the in-store displays resulted in increased sales. The average daily sales for a sample of 144 days for the San Francisco and Los Angeles stores were $11.6 million and $9.7 million. (Past experience has shown that OSF=1 1 and OLA=8 where OSF is the standard deviation in sales for the San Francisco store and OLA is the standard deviation for the Los Angeles store.) a. State the null and alternate hypotheses. b. What test would you use? Why? c. What is the calculated value of the test statistic? Show your calculations. d. What is the critical tabled value at 1 percent significance level? e. Would you reject the null hypothesis? Explain. f. What can Ruby Gem conclude