“Durable press" cotton fabrics are treated to improve their recovery from wrinkles after washing. Unfortunately, the treatment also reduces the strength of the fabric. The breaking strength of treated...

1. “Durable press" cotton fabrics are treated to improve their recovery from wrinkles after washing. Unfortunately, the treatment also reduces the strength of the fabric. The breaking strength of treated fabric is Normally distributed with mean 58 pounds and standard deviation 2.3 pounds.

A clothing manufacturer tests an SRS of 5 specimens of fabric.

What is the mean breaking strength of the 5 specimens?

What is the standard deviation of the 5 samples?

What is the probability that the mean breaking strength of the 5 specimens exceeds 60 pounds?

How do I solve for this?