Would like help solving

2. The weight of Lays brand bags of potato chips is normally distributed with a mean of 8.5 oz and a standard deviation of 0.45 oz.

A) What is the probability that we select a bag and it weighs over 9 oz?

B) Fill in the blank: 90% of Lays Potato chip bags weigh less than _______ oz.

C) Fill in the blank: 90% of Lays Potato chip bags weigh more than ________ oz.