a disney hotel, with a capacity of 300 rooms, numbers its fare classes from higher to lower as 1, 2, and 3. the room prices for these classes are , , . the demands for these fare classes turn out to have normal distributions with a mean of 50 and a standard deviation of 10. the hotel uses the emsr-a heuristic to compute the protection levels and booking limits. (a) what is the protection level for classes {1, 2}? [ select ] (b) what is the protection level for classes {1, 2, 3}? [ select ] (c) what is the booking limit for class 3?