In the object tree, right-click on the Reports node and select New Report > Force Coefficient in the pop-up menu.

This will create a new node called Force Coefficient 1 under the Reports node.

With the Force Coefficient 1 node selected, the settings for the report can now be entered via the Properties window.

1.0,0.0,0.0 (for drag).0.0161269 for Reference Area, the projected area of the quarter of the blunt body used in the simulation.1.277 for Reference Density, the density of the free stream air.264.6 for Reference Velocity, the velocity at the inlet.
Next, the drag-and-drop method will be used to select the part to be monitored, namely the Inner_wall boundary. Open the subdomain-1 node inside the Regions node. Open the Boundaries node and then drag the Inner_wall node onto the Force Coefficient 1 node.

The Inner_wall entry will now be listed in the Parts property of the Force Coefficient 1 node.
The setup for the report is now complete, and a monitor and a plot can be made from that report.