Adding actions to processes

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I am on Level 2 Sprint 1 training, here now I have created actions but now I want to add 1.5 and 1.6 to the processes to 1 Load products and T1.1, 1.2, & 1.3 to T1 Build Product Hierarchies.

below is the SS for reference. Can anyone help me with how can I do that?

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