11.) Determine the area under the standard normal curve that lies between 2 = EI.37 and z = 1.31? 12.) Find the Z-scnre that separates the middle 80% of the distribution from the area in the tails of the standard normal distribution? 13.) The number of chocolate chips in an 18-02 bag of chocolate chip cookies is approximately nonnally distributed with a mean of 1262 and a standard deviation of 118 chips. a.) \"that is the probability that a randomly selected bag contains between 1210 and 1373 diocolate chips? b.) What is the probability that a randomly selected bag contains more than 1450 chocolate chips? c.) Detemiine the number of chocolate chips in a bag of Chips Ahoy! that make up the middle 99% of bags? Include the graph