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Operation Toolpad > Geometry Command Button Button > Edge Command Button > Create Edge Edge
Shift-click on vertex 1 and then the vertex above it to create the inlet edge.
Similarly, create the vertical edge for the outlet.
(Click picture for larger image)
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Operation Toolpad > Geometry Command Button > Face Command Button > Form Face
Recall that we have to shift-click on each of the edges enclosing the face and then click Apply to create the face.
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