Problem $2(1$ pts$)$ A hotel numbers its fare classes from higher to lower as $1,2,3$ and $4.$ The room

prices for these classes are p$1=$$$300,$ p$2=$$$250,$ p$3=$$$200,$ p$4=$$$150.$ The demands for these fare

classes are denoted by D$1,$ D$2,$ D$3$ and D$4.$ The hotel considers the cumulative demands

D$1=$ D$1,$ D$1,2=$ D$1+$ D$2,$ D$1,2,3=$ D$1+$ D$2+$ D$3,$ D$1,2,3,4=$ D$1+$ D$2+$ D$3+$ D$4.$

These demands turn out to have uniform distributions with the following ranges:

D$1$ in $[0,10],$ D$2$ in $[0,10],$ D$3$ in $[0,10],$ D$4$ in $[0,10].$

a$)(0\mathrm{.}5$ pt$)$ Use EMSR$-$a heuristic to find the protection level y$3$ for classes $\{1,2,3\}?$

b$)(0\mathrm{.}5$ pt$)$ Use EMSR$-$a heuristic to find the protection level y$2$ for classes $\{1,2\}?$

My questions including:

The problem states that the hotel$$considers cumulative demands: D$1=$ D$1,$ D$1,2=$ D$1+$ D$2,$ D$1,2,3=$ D$1+$ D$2+$ D$3,$ D$1,2,3,4=$ D$1+$ D$2+$ D$3+$ D$4.$

It also mentions that the demands for each fare class have uniform distributions$$with ranges: D$1$ in $[0,10],$ D$2$ in $[0,10],$ D$3$ in $[0,10],$ D$4$ in $[0,10].$

$$ Therefore, the Problem should be solve using cumulative demands or uniform distributions?

Additionally, I am a bit confused about determining the protection levels for different classes. Specifically:

$$ For the protection level for classes $\{1,2,3\},$ should it be calculated by finding y$1,4$; y$2,4$ and$$y$3,4?$

$$ For the protection level for classes $\{1,2\},$ should it be calculated by finding y$1,4$; y$2,4$