The two intervals (114.3, 115.3) and (114.0, 115.6) are confidence intervals (calculated using the same sample data) for = true average resonance frequency (in hertz) for all tennis rackets of a certain type.(a)What is the value (in hertz) of the sample mean resonance frequency? (Hint: Where is the confidence interval centered?) hertz(b)The confidence level for one of these intervals is 90% and for the other it is 99%. Which one has a confidence level of 99%?(114.3, 115.3)(114.0, 115.6) It is impossible to tell which is which.How can you tell?The center of the 99% confidence interval should be less than the center of the 90% confidence interval.The 99% confidence interval should be wider than the 90% confidence interval. The center of the 99% confidence interval should be greater than the center of the 90% confidence interval.The 99% confidence interval should be narrower than the 90% confidence interval.It is impossible to tell which is which.