Ok I am completely lost, can anyone help me out? I have done the first question, and the second one is based on it.

The first question said:

The parent distribution of x is normal with mean 80 and standard deviation 9.

Based on samples of size n=25, find the mean and standard error of the sampling distribution of $\displaystyle \bar{x}$.

I said:$\displaystyle \mu_{\bar{x}}$ = 80

$\displaystyle \sigma_{\bar{x}}$ = 9/5

Thesecond questionis where I am lost.

It says find:

A. P(62 < x < 80)

B. P(71 < $\displaystyle \bar{x}$ < 77)

C. x' such that P($\displaystyle \bar{x}$ > x') = .05