$\backslash$table$[[$Probability$,$Demand$],[$S$1,$S$2],[$S$3,$Low$],[0\mathrm{.}10,15],[-15,-145],[$Medium$,0\mathrm{.}50],[55,65],[25,$High$],[0\mathrm{.}40,55],[105,205]]$

A$)$ Determine the EMV?

B$)$ Draw a Decision tree?

Choose the best alternative out the three, among

S$1$: Sub Contract

S$2$: Overtime

S$3$: New Setup

Through both methods

Note:$-$It is mandatory to draw a decision tree.