$3.$ Weighing the alternatives $[$Marks $2]$

When weighing the various alternatives, how well each alternative fulfils the variables to consider can be expressed as scores. A different rating scale will be used to assess each alternative:

$+2$ very suitable

$+1$ quite suitable

$0$ neither suitable nor unsuitable

$-1$ not quite suitable

$-2$ not suitable at all

Note: Positive numbers $(+2$ or $+1)$ indicate that the alternative is able to fulfil the variables, whereas negative numbers $(-2$ or $-1)$ denote the opposite.

$4.$ Draw a decision tree based on the case study for decision making,