Conduct an engineering analysis on Example 2 of a bridge structure and Determine the following with the missing information and conditions by your own research:

(1)Include the weight of the steel structure plus the weight of the concrete pavement road surface, 20 feet long x 12 feet wide and 6 inches thick.

(2)With realistic load distributions on front and rear wheels

What differences in the numerical solutions will you get in (1) and (2), and with (1) and (2) combined? You must supply all references sources in your solutions.