Draw a downward-sloping demand curve and a downward-then-upward -sloping marginal cost curve for having children. Indicate how each of the following influences affects the graph. In each case, explain the resulting effect on the quantity of children.

a) An economy that was primarily agricultural becomes primarily industrial, and child labor is prohibited in the industrial sector.

b)Employment rates and wages increase for women.

c) Infant mortality rates decrease.

d) The country adopts a system of support for the elderly.