Which of the following statements summarizes the incidence of the tax?
a) for each unit of the good that is sold, buyers bear one-half of the tax burden, and sellers bear one-half of the tax burden.
b) for each unit of the good that is sold, buyers bear one-third of the tax burden, and sellers bear two-thirds of the tax burden.
c) for each unit of the good that is sold, buyers bear one-fourth of the tax burden, and sellers bear three-fourths of the tax burden.
d) for each unit of the good that is sold, buyers bear three-fourths of the tax burden, and sellers bear one-fourth of the tax burden.