Model the staircase using the following tools: Move with copy (M + Ctrl) and Push/Pull (P).

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• Draw with a rectangle (R) the surface of a single step and Push/Pull (P) one step.

Step dimensions: 90cm x 28cm x 5cm (16 steps)

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• Create a group (G) with the step object.

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• Copy the steps using the elevation reference. You can also make multiple copies at once.