Solve these problems:

Exercise 10.4 The weights (in pounds) of adult (18 years or older) males in the US are approximately normally distributed with mean u = 187 and standard deviation o = 21.2. a. What is the probability that a randomly chosen adult male in the US will weigh no more than 212 pounds?b. What is the probability that the mean weight of a random sample of 23 adult males in the US will be at least 177 pounds?Exercise 10.1 Let x be a random variable that represents the time, in minutes, that it takes for students to complete a final exam. You may assume that x has an approximately normal O. distribution with mean a = 115 and standard deviation o = 13.7. a. What is the probability that a randomly selected student takes at least 140 minutes to take the final exam? anlob yd no b. What is the probability that a randomly selected class of 28 students has a mean completion time of at most 110 minutes?Exercise 10.3 Jillian walks to work each day. Let x be a random variable that represents the Jugoa time (in minutes) that it takes Jillian to walk to work. You may assume that x has a normal distribution with mean / = 24 and standard deviation o = 3.4. a. Find the probability that on a randomly selected day, Jillian will walk to work in at most 30 minutes. C. Find the probability that on 12 randomly chosen days, the mean time for Jillian to barIT walk to work will be at least 23 minutes