The supply function and demand function of a certain agricultural product are as follows: $S=2p-40D=-2p+120.p$ is the unit price. Let's assume that the home country is a small country. The international price of the product is $P^{**}=25.$ The government then decides to impose restrictions on the import quantity of this product and the limited amount is $M=x^{\text{'}}-Y\text{'}($see the graph$).$ In an open economy situation, when $M=40,$ please calculate the consumer surplus of this country.

$($Question $9$ continued$)$ Please calculate the producer surplus of this country.

$($Question $9$ continued$)$ Please calculate the total surplus of this country.

$($Question $9$ continued$)$ Please calculate the deadweight loss of this country.