निम्नलिखित में से कौन सी शैशवावस्था (infancy) की प्रमुख मनोवैज्ञानिक और व्यावहारिक विशेषताएँ हैं?

Arrange the following stages / milestones of early childhood development in the correct chronological order: 1. Development of symbolic thinking and imagination 2. Reflexive responses such as sucking and grasping 3. Emergence of simple language and vocabulary 4. Ability to engage in cooperative play with peers

According to general developmental psychology developmental stages, what is the typical age range for the childhood period (comprising early and late childhood)?