According to Jean Piaget's theory of cognitive development, what is the age range of the 'formal operational stage'?

→ Under Jean Piaget's theory of cognitive development, when conducting an in-depth analysis of the main developmental characteristics of the 'Formal Operational Stage' (11 years and beyond) in the context of 'Hypothetico-Deductive Reasoning' and 'Combinatorial Thinking', which of the following statements most accurately explains the true cognitive maturity of this stage? → What is the duration of the 'Formal Operational Stage' proposed by Jean Piaget under his Cognitive Development Theory, and which of the following is the most prominent psychological characteristic of this stage? → Under Child Development and Pedagogy, consider the following statements with reference to Jean Piaget's 'Theory of Cognitive Development': 1. According to Piaget, cognitive development is not a continuous process but a sequential and qualitatively different process occurring in stages, where every child constructs their own knowledge by interacting with their environment. 2. During the 'Concrete Operational Stage', children develop the capacity for 'Conservation', 'Classification', and 'Decentration', but they remain unable to solve problems based on abstract or hypothetical reasoning. 3. The 'Formal Operational Stage' is the final stage of this theory, starting from adolescence, in which the capacity for 'Deductive Reasoning' and 'Hypothetico-Deductive Reasoning' is fully developed. Which of the above statement(s) is/are correct? → According to Jean Piaget's theory of cognitive development, what is the age span of the 'Formal Operational Stage'? → According to Jean Piaget, in which stage of cognitive development does a child learn the quality of 'conservation'? → According to Jean Piaget's theory of cognitive development, the quality of 'conservation' develops in children during which stage? → According to Jean Piaget, the capacity for 'abstract thinking' and 'hypothetical-deductive reasoning' develops in which stage? → According to Jean Piaget, the trait of 'Object Permanence' develops in which stage?