A hotel numbers its fare classes from higher to lower as 1,2,3, and 4. The room prices for these classes are p1=$350,p2=$300,p3=$250, and p4=$200. The demands for these fare classes are denoted by D1, D2, D3, and D4. These demands turn out to have uniform distributions with the following ranges: D1[0,10],D2[0,10],D3[0,10],D4[0,10]. a) Use EMSR-a heuristic to find the protection level y3 for classes {1,2,3} ? b) Use EMSR-a heuristic to find the protection level y2 for classes {1,2} ? c) Use EMSR-a heuristic to find the protection level y1 for class [1]? d) What is the protection level y4 for classes {1,2,3,4}