A government is contemplating an increase from $1 to $1.1 in the toll on a highway that is - at present - used by 70,000 cars per week. After the toll is increased, it is projected that only 65,000 cars per week will use it. Assuming that the (weekly) marginal cost of highway use is equal to $1 per car:

Represent graphically the welfare changes attributable to the increase in the toll and calculate the net social surplus change.