Even within a particular chain of hotels, lodging during the summer months can vary substantially depending on the type of room and the amenities...

(a) Find a 95% confidence interval for the difference in the average room rates for the Hotel A and the Hotel B chains. (Round your answers to two decimal places.)

$_____ to $_____

(b) Find a 99% confidence interval for the difference in the average room rates for the Hotel B and the Hotel C chains. (Round your answers to two decimal places.)

$_____ to $_____