2. (The road) Refer to the transportation alternatives problem of Example 5 2. The bridge at Cay Road is actually part of the road between Augen and Burger Therefore it is not reasonable for the bridge to have fewer lanes than the road itself This means that if projects 2 or 4 are carried out, either projects 6 or 7 must also be carried out. Formulate a zero-one programming problem that includes this additional requirement Solve the problem.