Pwease help me <3 Have a great day y’all!

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

Which expression gives you the distance between the points (5,1)and(9,-6)