9.2 divided by 3.2

please help

How do you do this geometry problem

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?

On a piece of paper, graph y< x+1. then determine which answer matches the graph you drew.