(1,-6)(-5,2) distance is 10
You use the lower case letter s for the sample standard deviation
You use the greek letter sigma (written as

) for the population standard deviation
Here i will get back to u i gotta do the work
Use a protractor it will help a lot that what I am doing in class you see the little hole on the protractor right you put were you see the dot and put the hole on the dot then you make the line and then it will give your answer