Can anyone give me all answers please hopefully it shows the right thing

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?

The complement of an angle is one-sixth the measure of the supplement of the angle. what is the measure of the complement angle?

Arectangular yard has area 96 square feet. if the width of the yard is 4 feet less than the length