1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution Hello, I am trying to construct the model, but I don't know how to incorporate 3 steps. I tried making 3 step blocks, but the input for the transfer function will only take one line. Then I tried to use one step block and make a vector indicating a new step at 3 different times But this is not working, it doesn't like the vector input. Any idea how I can utilize 3 steps?