Statistics help please.

Hi all. No... I don't want you to do my homework for me. But please, help teach me how to do this. It's for an intro Statistics class.

Suppose a simple random sample of size n = 36 is obtained from a population with u (mean) = 64 and o (std. dev.) = 18.

a)describe the sampling distribution of X (sample mean).
b)What is P(x < 62.6)?
c)What is P(x > or = to 68.7)?
d)what is P(59.8 < X  < 65.9)?

Please help walk me through this so i can see how it is done.
The X is actually the X with the line over it for the sample mean.

Heh, I should have waited until the trolls went to bed before I asked this. Because if you look at it you can see that the
A)
B)
C)
D)

are just different parts of the question, and not answers.