After making his car, Jack wants to see if it works or not. Which step is this? Is it Find a problem, Plan and Build, Test and improve, Redesign or Communicate?

Jack shows his toy car to his Grandma. Which step is this? Is it Find a problem, Plan and Build, Test and improve, Redesign or Communicate?

Jack takes his notebook and draws all the ways of making his cars and the materials he will use. This is his 2 step in the design process. Is it Find a problem, Plan and Build, Test and improve, Redesign or Communicate?

We use the design process to solve problems. Yes or No?

Once Jack draws his car, he starts to build it. Which step is this? Is it Find a problem, Plan and Build, Test and improve, Redesign or Communicate?

Jack made the wheels of paper and they are not moving. He wants to improve his design. Which step is this? Is it Find a problem, Plan and Build, Test and improve, Redesign or Communicate?

Jack changes the paper wheels to bottle caps to make his car work better. This is the 4 step. Is it Find a problem, Plan and Build, Test and improve, Redesign or Communicate?

Jack went to his grandma's house and forgot to bring his toy car. He got the idea of making his own car. Which process can Jack use to make his car, the building process or Design process?