Sarah is investigating whether her daughter is able to see the world from the perspective of other people. She took her daughter to the local park and asked her to look at the playground equipment. She placed a toy robot in a different location to her daughter (see Figure 1). Figure 1 Sarah then asked her daughter to tell her what the toy robot can see. Her daughter stated that the toy robot can see the swings at the front and the slide at the back (a) Explain which stage of cognitive development Sarah's daughter is in according to her statement. You should to Piaget and Inhelder (1956) Three Mountains task in your answer.​