describe the four stages of cognitive development

hello,

could you please answer the following question:

Describe the four stages of cognitive development that Jean Piaget explained in his theory of cognitive development?

the four stages are :

1. Sensorimotor stage (Beginning from birth to age 2 ears)

2. Pre-operational stage (From age 2 until age6 or 7).

3. Concrete operational stage( from age 6 or 7until 11 or 12 )

4. Formal operational stage (Begin around age 11 or 12 through adulthood).

please provide a clear description for each stage and include the citation within the text

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