Please answer the question ASAP. I will give you a thumb up. please

b) 10 marks A B D E The Graph above shows how the execution of different tasks (represented by the vertices of the Graph) depend on the completion of other tasks. For example, prior to the starting of task D, tasks A and B need to be completed. You are required to find the linear ordering of the vertices such that if (u, v) is an edge, then u precedes v in the ordering. Show your working clearly