2.1) Do all-or-nothing assignment for the simple network shown in Figure 2. Origin- destination demand matrix for this network is presented in Table 1. Link times and directions are provided in the figure. You can do these calculations manually, or by writing a computer program (in case of writing a program, it should be included in your submissions). [6 marks] 2.2) Discuss the assumptions of all-or-nothing assignment and their drawbacks. In spite of these assumptions, how can this method be useful for transportation planners? [2 marks] OD From 100 50 0 0 100 50 100 0 100 Table 1-OD demand matrix 2 5 10 4 15 Figure 2 - Network for all-or-nothing calculation