I need help with every questions please

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?

Find the value. a. 0.003 b. 0.03 c. 0.3 d. 3

Which is the scale factor proportion for the enlargement shown?