Can y’all please help me on question 8 please

Mrs. renoir has completed the interior portion of a quilt top measuring

Which shows the pre image of triangle xyz

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?