I figured out the first question but don't seem to understand the other two

Suppose that the age of students at George Washington Elementary school is uniformly distributed between 6 and 10 years old. 43 randomly selected children from the school are asked their age. Round all answers to 4 decimal places where possible.
What is the distribution of X ? X ~ U =(6 , 10)
Suppose that 43 children from the school are surveyed. Then the sampling distribution is
What is the distribution of ¯x? ¯x ~ N( , )

What is the probability that the average of 43 children will be between 8 and 8.3 years old?