Use the figure to answer two questions.

The horizontal axis is labeled real output in quantity in billions per year and it ranges from $0$ to $20$ in increments of $2.$ The vertical axis is labeled price level in average price and it ranges from $20$ to $40$ in increments of $2.$ The concavely upward increasing curve is labeled A S$.$ It starts from $(2$ comma $25),$ rises concavely upward through $(8$ comma $26),(11$ comma $27),(15$ comma $30),$ and ends at the point $(17$ comma $36).$ The first decreasing line is labeled A D sub $1.$ It starts from $(2$ comma $31),$ intersects the curve at $(8$ comma $26),$ and ends at $(13$ comma $22).$ The second decreasing dashed line is labeled A D sub $2.$ It starts from $(2\mathrm{.}5$ comma $34),$ intersects the curve at $(11$ comma $27),$ passes through $(12$ comma $26),$ and ends at $(16\mathrm{.}5$ comma $22).$ The third decreasing dashed line is labeled A D sub $3.$ It starts from $(7$ comma $37),$ intersects the curve at $(15$ comma $30),$ passes through $(18$ comma $27),$ and ends at the point $(19$ comma $26).$ Vertical and horizontal dashed lines are drawn from all the intersection points and passing points to the respective axes.

Instructions: Enter your response as a whole number.

Suppose the economy is at full$-$employment when AS $=$ AD$3.$

The GDP gap when the demand curve is at AD$2$ is $ billion.

Is the economy in a recession or expansion?

The economy is in $($Click to select$)$ an expansion$$ a recession$.$