A survey asked chief executives at leading U.S. firms the following question: "Where do you expect the U.S. economy to be 12 months from now?" A representative sample of their responses appears below: Same Worse Same Worse Worse Better Worse Better Same Worse Worse Same Worse Same Worse Same Better Same Worse Worse Better Worse Better Worse Worse Click here for the Excel Data File a-1. Construct frequency and relative frequency distributions that summarize the responses to the survey. (Do not round intermediate calculations. Round "Relative Frequency" to 2 decimal places.) Relative Expectation Frequency Frequency Better Same Worse a-2. Where did most chief executives expect the U.S. economy to be in 12 months? O Better O Worse O Same b. Select a pie chart and a bar chart for the frequency and relative frequency distributions found in part a-1. Chart A Pie-Chart Bar-Chart Expectations of U.S. economy Expectations of U.S economy 0.60 quency 0.50 Better Better - 0.40 20% Same 2 0.30 Worse Worse 0.10 52% Same 28% Better Same Worse Expectation Type Chart B Pie-Chart Bar-Chart Expectations of U.S. economy Expectations of U.S economy 0.60 0.50 Better Wors 0.40 Better 20% 28% Same 0.30 $ 0.20 Worse 4 0.10 Same 0.00 52% Better Same Worse Expectation Type Chart C Pie-Chart Bar-Chart Expectations of U.S. economy Expectations of U.S economy 0.60 0.5 requency Better - 0.40 Worse Same + 0.30 32% 920 Better Worse 0.10 52% 0.00 Same 16% Better Same Worse Expectation Type O Chart A O Chart B O Chart C