4. Given that Z is the standard normal distribution: Z~N(0,1), determine: a)Prob(Z < 1.89) b)Prob(Z < -1. 53) c)Prob(0. 05 < Z < 1.52) Given that a variable X is

normally distributed with mean u = 12 grams and standard deviation o = 2,answer the following. d)What is the probability that X is greater than 15? e)What is the probability that X is between 13 and 16?