Consider two firms with the following marginal abatement costs (MAC) as a function of emissions (E):

MAC_1 = 33 -3E_1

MAC_2 = 8 - 2E_2,

and assume marginal external damages (MED) from the aggregate emissions of both firms (E_Agg = E_1 + E_2) is:

MED = 2E_Agg

In the absence of government intervention, total external damages (TED) are ____.