A road is to be constructed between two cities. Two routes are proposed: A and B$.$ Use multiple criteria decision analysis to find out which proposal is most suitable. $(15$ marks$)$

Proposal A has the following characteristics:

Construction cost: $1\mathrm{.}5$ million dollars

Life cycle: $20$ years

Cross agriculture lands: $50\%$ of the road is located in agricultural areas.

Annual maintenance cost: $20,000$ dollars

Served people: $55,000$ inhabitants.

Proposal B has the following characteristics:

Construction cost: $1\mathrm{.}75$ million dollars

Life cycle: $20$ years

Cross agriculture lands: $20\%$ of the road is located in agricultural areas.

Annual maintenance cost: $30,000$ dollars

Served people: $25,000$ inhabitants.

Assume an interest rate of $3\%$

Tips: Choose your weights and assign the rates for economic, social, and environmental factors.