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Use the sample information 5: = 40, U: 4, n = 20 to calculate the following confidence intervals for,tJI assuming the sample is from a normal population. [a] 90 percent condence. (Round your answers to 4 decimal places.} The 90% condence interval is from |to {b} 95 percent confidence. {Round your answers to 4 decimal places.) The 95% confidence interval is from | to {c} 99 percent condence. {Round your answers to 4 decimal places} The 99% confidence interval is from to id} Describe how the intervals change as you increase the condence level. 0 "he interval gets narrower as the condence level increases. O The interval gets wider as the condence level decreases. 0 "he interval gets wider as the condence level increases. O The interval stays the same as the condence level increases