Question 1: Your city is building a new bridge over a 4 metres wide river. Local traffic studies identified that the maximum load the bridge may experience is when a 10,000 kg truck is exactly at the mid-point of the bridge. Three local companies presented proposals for the bridge design: Pratt Engineering, Baltimore Engineering, and K-Engineering. Their proposed designs are shown below. You are the city engineer responsible for evaluating the designs and choosing the most appropriate one. Solve Pratt's design using the Method of Joints - must present calculations [10 points]; Solve Baltimore's design using the Method of Sections - must present calculations [10 points]; Solve K's design using an online truss calculator, e.g., https://valdivia.staff.jade- hs.de/fachwerk_en.html [10 points]; Choose one design - your criteria may include [10 points]: o Minimum absolute force on any member. Least amount of material. Complexity of construction. Your engineering judgement. o Aesthetics. Tips: All designs are symmetric and so is the distribution of forces in the members. The last item (i.e., the choice) will be marked based on your discussion. There is no necessarily correct answer.Pratt Engineering's Proposed Design: Only horizontal and vertical cars lengths Baltimore Engineering's Proposed Design: 2m Im 95 0.5 0.5 05 09 0.5 10,090 KqK-Engineering's Proposed Design: 05 0.5 1.5 I m Im Im 0.5 0.5 0.5 0. 6 0.5 0.5 05 77 7 V 10, 000 k