Assume that both the u. s. and canadian demand curves for lumber are linear. the canadian demand curve lies inside the u. s. curve (the canadian demand curve hits the axis at a lower price and a lower quantity than the u. s. curve). draw the aggregate demand curve for the two countries. explain the relationship between the country and aggregate demand curves in words. using the multipoint curved line drawing tool, show the market demand curve for lumber. label this demand curve 'upper d superscript market.'