So, let's take a couple of examples on how to draw a precedence diagram or an activity on node. And we will start with something very basic, very simple, and then we will advance slowly on it in the following examples. So, if I ask you here, try to practice with me. Draw an activity on node diagram for the following construction project or construction activities. You have four activities from A, B, C and D. Activity A does not have any predecessor activities. So, when I hear something like that, that means that it's the first activity we have. Activity B, the predecessor is A. C is, the predecessor of it, is A. Activity D, the predecessor activities for D is B and C. It's very simple, straightforward. I would draw then activity A, and then we have activity B. And we said, the relationship between activity A and B is A is the predecessor. And then we have activity C. And the predecessor of activity C is A. And then we said, the last activity is activity D. And the predecessors are B and C. Very straightforward, very simple and only four activities in your project and example here. Let's take another example. Example 2, we have around five construction activities and the predecessor activities for B and C is A. That means when activity A finishes, activity B and C will start. And then we have activity D that depends on, activity B when it finishes, D will start. And then activity E will not start until activity C And D, well, finishes. So, let's draw that very quickly. We have, Activity A here, and we said, activity B and C, the predecessors of activity A. However, we said activity D, The predecessor is activity B. And then, we do have the last activity is E with the predecessor activities of D and C. Very also straightforward, if you noticed, the practice and the recommendations I gave earlier, is I'm going from left to right, And I try as much as possible not to have any crossings. And in this situation, I don't have the last or the beginning of the project. Two or three activities or more will finish or will start at the same time at the beginning of my diagram. So, we can start with one node and we finish with activity E with another one node only. So, for example number 3, I want you to do the same exact construction activities but instead of having activity E, depends on finishing activity C and D, we want to take activity D out and add activity B. So, let's redraw the same example, but with the last as, with the last change we have for activity E here. So in this case, we have Activity A. If we remember, we have activity B here. Activity C, we do have the relations. And then we have activity D here. And if you remember, that's what it was and then we had activity E towards the end here because it used to depend on D and C. But we change it, activity E depends on B and C, then I would recommend to have then activity E here. With the following relationships of the updated one and then we do have our project. However, what's the recommendation we give? Before it was starting with one node and ending with one node. Now, we have a project starting with one node and ending with two nodes. That's why the recommendation here is to have another node. We can call it like project finish or you can say finish or end of the project. And you connect the last two activities to that one last node of your project. So, that would be our project. So, let's go with a last example in our module here, to highlight also another set of activities that we want to draw an activity on node diagram for. And we have from A to E but notice that activity A, B and C, they don't have any predecessor activities. So, that means, that the beginning of the project will start with these three activities. However, activity D will depend on A and B, when they finish, we're going to start then activity D and activity E will not start until we finish activity B and C. So, let's draw this example. So, we do have, Activity A, activity B, and activity C. And we said, activity D, the activities depend on activity A and activity B, so we can highlight D here. With two arrows to highlight this relationship. And we have activity E, Here that depends on B and C. So, this is a good example that we do have now our project. But as I just explained, we have to have a one first node to connect the beginning of the project and we can call it project start. And then we need to connect with arrows to highlight the beginning of our construction project here. And then we will highlight, also, towards the end, we do not leave it with two nodes, we have to combine them into one node, project finish. And highlight the two arrows, connected to the last end node of our project. And that will be the solution for that case. So, these are the four examples that I highlighted in today module. I highly encourage you to keep practicing to understand the concepts and to go through the recommendations that I highlighted earlier on what need to be done to be able to build a good understanding, very clear an activity on node diagram.