You have to say what or where point B and C is for me to answer it
Answer:
The answer is
Step-by-step explanation:
Answer:

Step-by-step explanation:
The missing parameters are:
--- population
--- population mean
-- population standard deviation
Required

First, calculate the sample standard deviation




Next, calculate the sample mean 

So:

So, we have:



Calculate the z score




So, we have:

From the z table

So:

Do 18x18 which equals 324