Total net shipments of aluminum (in billions of pounds) are approximated by gx)-16.4+2.869 In(x+ 1) where x -O corresponds to 1990 (a) How many pounds of aluminum were shipped in 2002 and 2004? (b) Assuming the continued accuracy of the model, when will aluminum shipments reach 28200,000,000 pounds (a) The net shipments of aluminum in 2002 were approximately billion pounds (Type an integer or decimal rounded to the nearest thousandth as needed.)