On the tab labeled $"$CPM Network", you will find a skeleton AON network. The layout includes the activities required to complete the project. Based on the list of activities and predecessors on the $"$CPM Calculation" tab, enter the arcs $($lines$)$ to connect the activities. In the model you will note I left a single arc $($line$)$ for you. You may copy$/$paste this as many times as required to assemble your model. You can adjust the slope and length of the line as required by clicking your mouse on the line itself. Do not change any other formatting in the CPM Network tab, just enter the arcs. In the network model I have provided on the $"$CPM Network" tab, what do the lines you entered represent?